DE1061650A1

DE1061650A1 -

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Publication number: DE1061650A1
Authority: DE

Description

Es sind Rundschleifmaschinen bekannt, bei denen die Abzieheinrichtung die Schleifspindelbewegung synchron mitmacht und beide Teile relativ zueinander verstellbar sind. Beim Abziehen der Scheibe wird die Schleifspindel zuvor gegenüber dem Diamant verstellt und dann abgezogen. Diamant und schneidende Scheibenfläche liegen dann auf einer gemeinsamen Geraden. Mithin kann bei der Bestimmung des Abschaltzeitpunktes bzw. des Zustellendes immer vom Abstand Diamantspitze—Werkstück ausgegangen und dieser ständig durch eine Meßuhr kontrolliert werden. Der Diamanthalter kann auch bei Erreichen des richtigen Werkstückmaßes gegen einen Endschalter anlaufen und damit die Zustellung der Maschine abschalten. Derartige Maschinen arbeiten sehr genau.Cylindrical grinding machines are known in which the pulling device controls the movement of the grinding spindle participates synchronously and both parts are adjustable relative to each other. When pulling off the disc the grinding spindle is previously adjusted in relation to the diamond and then removed. Diamond and cutting Disc surfaces then lie on a common straight line. Thus, when determining the The switch-off time or the end of infeed is always based on the distance between the diamond tip and the workpiece and this can be constantly checked by a dial gauge. The diamond holder can also be used at Reaching the correct workpiece size start against a limit switch and thus the infeed of the Switch off the machine. Such machines work very precisely.

Hingegen arbeiten die heute üblichen Flächenschleifmaschinen — sofern sie keine Meßsteuerung mit Abtastung der Werkstückhöhe oder der schneidenden Schleifscheibenfläche besitzen -— so, daß der Endanschlag, der die unterste Endlage des Werkzeugschlittens begrenzt, nach jedem Abziehen der Scheibe nachgestellt werden muß, da sich ja die Lage der schneidenden Schlei fs cheibenfläche beim Abziehen verlagert.On the other hand, the surface grinding machines customary today work - provided they do not have a measuring control with scanning of the workpiece height or the cutting grinding wheel surface - so that the End stop that limits the lowest end position of the tool slide after each pulling off of the pane must be readjusted, since the position of the cutting surface of the grinding disk changes when it is removed relocated.

Die hier zu lösende Aufgabe besteht nun in der Schaffung einer durch Endanschlag gesteuerten Flächenschleifmaschine, bei der — genau wie bei den eingangs beschriebenen Rundschleifmaschinen — ein Nachstellen des Endanschlags beim Abziehen der Scheibe entbehrlich ist. Darüber hinaus soll erreicht werden, daß feinste Zustellgrößen die der Schleifspindelpinole durch das Zustellgetriebe vermittelt werden, auch tatsächlich zu ebenso großen Verstellbewegungen der Scheibe führen, ohne einen Stickslipeffekt hervorzurufen.The task to be solved here now consists in creating one that is controlled by an end stop Surface grinding machine, in which - just like in the cylindrical grinding machines described above - a Readjustment of the end stop when pulling off the disc is unnecessary. It also aims to achieve that the finest infeed sizes conveyed by the grinding spindle quill through the infeed gear will actually lead to just as large adjustment movements of the disc without a stick slip effect to evoke.

Die Erfindung ist dadurch gekennzeichnet, daß bei einer bekannten, durch einen Endanschlag gesteuerten Flächenschleifmaschine mit stirnseitig schneidender Scheibe, deren Schleifspindel in einer durch ein selbsthemmendes Schneckengetriebe drehantreibbaren sowie axial festgehaltenen Transportmutter axial verstellbaren Pinole gelagert ist, die Abzieheinrichtung in einer weiteren Pinole mit zur ersten Pinole paralleler Achse untergebracht ist, wobei einerseits die erste Pinole durch den üblichen ihrer Transportmutter vermittelten Drehantrieb allein grobverstellbar, während sie durch ein Zustellgetriebe, durch das beide Pinolen gemeinsam synchron und weggleich verstellbar sind, unter Vermittlung einer schraubenden Bewegung feinzustellbar ist, und andererseits die zweite Pinole mit dem Endanschlag zur Begrenzung der Zustellbewegung zusammenwirkt.The invention is characterized in that in a known, controlled by an end stop Surface grinding machine with face-cutting disc, the grinding spindle in one through a self-locking Worm gear rotatably driven and axially fixed transport nut axially adjustable Quill is mounted, the pulling device in a further quill with parallel to the first quill Axis is housed, on the one hand the first quill through the usual transport nut mediated rotary drive only roughly adjustable, while it is through an infeed gear through which both Quills can be adjusted together synchronously and with the same path, mediated by a screwing movement is finely adjustable, and on the other hand the second quill with the end stop to limit the Infeed movement cooperates.

So wird es nun auch bei Flächenschleifmaschinen Schleifmaschine mit getrieblich gekoppelter Zustellung der Schleifspindel und der AbzieheinrichtungThis is how it is now also geared with surface grinding machines coupled infeed of the grinding spindle and the pulling device

Anmelder: Gesellschaft ίο der Ludw. von Roll'schen Eisenwerke A. G. Gerlafingen (Schweiz)Applicant: Gesellschaft ίο der Ludw. von Roll'schen Eisenwerke AG Gerlafingen (Switzerland)

Vertreter: Dipl.-Ing. B. Wehr, Dipl.-Ing. H. Seiler, Berlin-Grunewald, Lynarstr. 1, und Dipl.-Ing. H. Stehmann, Nürnberg 2, PatentanwälteRepresentative: Dipl.-Ing. B. Wehr, Dipl.-Ing. H. Seiler, Berlin-Grunewald, Lynarstr. 1, and Dipl.-Ing. H. Stehmann, Nürnberg 2, patent attorneys

Beanspruchte Priorität: Schweiz vom 10. August 1953Claimed priority: Switzerland of August 10, 1953

mit einer in einer durch einen Schneckenantrieb axial verstellbaren Pinole gelagerten Spindel gleichfalls ermöglicht, Schleifspindel- und Abziehdiamant unter Beibehaltung der Relativverstellbarkeit beider Teile beim Abziehen synchron und weggleich feinzustellen.also with a spindle mounted in a spindle which is axially adjustable by a worm drive enables grinding spindle and honing diamond while maintaining the relative adjustability of both parts to be fine-tuned synchronously and with the same path when pulling off.

Hier ist allerdings zu bemerken, daß das schraubende Zustellen der Schleifspindelpinole zur Vermeidung des Stickslipeffekts im Schleifmaschinenbau bereits bekannt ist.It should be noted here, however, that the screwing infeed of the grinding spindle quill is to be avoided the stick slip effect is already known in grinding machine construction.

In der Zeichnung ist eine beispielsweise Ausführungsform des Erfindungsgegenstandes veranschaulicht. Es zeigtAn example embodiment of the subject matter of the invention is illustrated in the drawing. It shows

Fig. 1 einen Querschnitt durch die Einrichtung, Fig. 2 einen Schnitt nach der Linie I-I in Fig. 1. Am Querträger 1 einer Flächenschleifmaschine ist der Tragschlitten 2 verschiebbar gelagert, an dem eine Platte 3 befestigt ist. An dieser ist ein Schlitten 4 festgemacht, der mittels einer Gewindespindel 5 und einem Kegelrädergetriebe 6 und 7 durch die Nutenwelle 8, die im Querträger 1 gelagert ist, in der Höhe verstellbar ist. Der Schlitten 4 weist zwei Augen 9 auf, in welchen der Schlittenteil 10 mittels Spitzschrauben 12 gelagert ist. Eine Gelenkschraube 13 ermöglicht eine bestimmte Schrägstellung des Schlittenteiles 10, um die Topfscheibe 14 in die gewünschte Schleif stellung zu bringen. Im Schlittenteil 10 ist eine Pinole 15 drehbar und vertikal verschiebbar gelagert,1 shows a cross section through the device, FIG. 2 shows a section along the line II in FIG. 1. The support slide 2 , to which a plate 3 is attached, is slidably mounted on the cross member 1 of a surface grinding machine. A slide 4 is fixed to this, which is adjustable in height by means of a threaded spindle 5 and a bevel gear 6 and 7 through the grooved shaft 8, which is mounted in the cross member 1. The slide 4 has two eyes 9 in which the slide part 10 is mounted by means of pointed screws 12. A hinge screw 13 allows a certain inclination of the carriage part 10 to bring the cup wheel 14 in the desired grinding position. In the slide part 10 , a quill 15 is rotatably and vertically displaceably mounted,

909 577/48909 577/48

Claims

in which the grinding spindle 17 is held rotatably and axially immovable and is driven via the belt pulley 18. The quill 15 has an external thread 19 on which the worm wheel 21, designed as a transport nut, sits, which can be rotated by the worm 22 seated on the shaft 23 by means of the crank 24. The worm wheel 21 is supported, pressed by the compression spring 26, against the end face 25 a of the ring 25, which is firmly connected to the slide part 10, whereby a play-free axial mounting of the quill 15 is achieved. Parallel to this first quill 15, a second quill 30 is axially displaceable in the slide part 10, but is mounted in the rollers 31 so that it cannot rotate. In this second quill 30, the rod 32 is rotatably and axially displaceably mounted, on which a radially protruding arm 33 is attached, on which the diamond 34 is seated. The rod 32 has a recess 35 into which the roller 36, which is seated on a pivot lever 37, engages. This pivot lever is pivotably mounted on the bolt 38 and can be held in place at two different heights by means of two notches. The arm 33 can also be attached to the rod 32 in reverse so that the diamond 34 stands down to turn the top edge of the grinding wheel. The quill 30 has an external thread on which the spur gear 45 designed as a threaded nut sits. By the spring 47, which presses against the upper end face of the quill 30, the spur gear 45 is pressed with its lower end face against the slide part 10, whereby the second quill 30 is supported axially free of play. A feed motor 50 drives the spindle 52 on which the pinion 53 is seated via a worm gear 51. This engages both in the spur gear 54 firmly connected to the first quill 15 and in the spur gear 45. The internal thread of the spur wheel 45 and that of the worm wheel 21 have exactly the same pitch, so that the rotation of the pinion 53 causes the two sleeves 15 and 30 to perform an axial movement of exactly the same size. The external toothing of the first quill 30 - that is to say the spur gear 54 - or the pinion 53 has a width corresponding to the quill stroke. There are thus two different delivery options of the grinding wheel 14 with respect to the workpiece 62 to be ground. The coarse feed takes place by turning the lever 24. This now causes a rotation of the worm 22 and the worm wheel 21, since the quill 15 is prevented from rotating by the pinion 53, which is in turn held by the self-locking worm gear 51. As a result, the quill 15 and thus the grinding wheel are displaced in the axial direction. The fine feed takes place in such a way that the pinion 53 is set in rotation by the feed motor 50 via the worm gear 51 and the rod 52. As a result, the quill 15 rotates in the now stationary worm wheel 21, since this is blocked by the worm 23 with a self-locking pitch. Since the pinion 53 engages in the spur gear 45 at the same time, the second quill 30 and with it the rod 32 are displaced synchronously and at the same time as the grinding spindle in the axial direction. The following device is used for the automatic infeed of the grinding spindle: On the quill 30 there is an arm 65 to which an adjusting screw 56 is attached. A dial gauge 57, on which the adjusting screw 56 acts, is fastened to the slide part 10. The dial gauge 57 has a switching pin 57 a which acts on the switch 58. This switch causes the signal lamps 59 and 60 and the feed motor 50 to be switched on and off Set dimension is set. The grinding allowance Z is determined by means of the dial gauge 63 and transferred to the dial gauge 57 by hand. The grinding and honing proceeds as follows: First, the grinding wheel 14 is honed with the diamond 34 and then the surface of the workpiece 62 is slightly ground, so that the grinding allowance Z - i.e. the dimensional difference - between the workpiece 62 and the Doctrine 61 can be ascertained. The grinding wheel 14 and the diamond 34 are thus above the nominal dimension of the gauge 61 by the grinding allowance. The dial gauge 57 is now set to the same value that the dial gauge 63 shows by means of the adjusting screw 56. The swivel arm 33 with the twisting diamond is now swiveled into the position shown in full lines, whereupon the grinding process can begin. By means of a potentiometer (not shown in the drawing), the motor 50 is switched on for a certain time after each stroke of the machine table, as a result of which the two quills 30 and 15 are screwed down or, if necessary, up by exactly the same amount . Shortly before the set target dimension is reached, the red lamp 59 is first switched on in a known manner. The operator now knows that the finishing touches are imminent. The machine can now, if necessary, be stopped and the wheel advanced somewhat by turning the lever 24 and the arm 33 can then be placed in the peel-off position and the grinding wheel peeled off. The position of the diamond 34 in relation to the grinding wheel working surface has not changed, so that the machine can be switched on for the final grinding without repeated measurement. When the pointer of the dial gauge 57 reaches the zero position, the green lamp 60 lights up and the feed motor is switched off by the limit switch 58. Patent claims:

1. Grinding machine with gear-coupled delivery of the grinding spindle and the opposite one adjustable puller, d. H. with synchronous delivery of disc and diamond, and a control of the pane infeed by means of an end stop or contact, characterized in that that in a known surface grinding machine controlled by an end stop (58) with face-cutting disc, the grinding spindle (17) of which in one by a self-locking Worm gear (21 to 23) rotatably driven and axially held transport nut (21) axially adjustable quill (15) is mounted, the pulling device (33, 34) in a further quill (30) is accommodated with an axis parallel to the first quill (15), with the first quill on the one hand (15) can only be roughly adjusted by the usual rotary drive provided by its transport nut (21), while they are through a feed mechanism (45, 53, 54), through which both quills (15, 30) together