EP0220375A2 - Grinding head for a machine for sharpening helically-fluted cutting tools - Google Patents

Grinding head for a machine for sharpening helically-fluted cutting tools Download PDF

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Publication number
EP0220375A2
EP0220375A2 EP86108703A EP86108703A EP0220375A2 EP 0220375 A2 EP0220375 A2 EP 0220375A2 EP 86108703 A EP86108703 A EP 86108703A EP 86108703 A EP86108703 A EP 86108703A EP 0220375 A2 EP0220375 A2 EP 0220375A2
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Prior art keywords
grinding
grinding head
axis
tool
spindle
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EP86108703A
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German (de)
French (fr)
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EP0220375A3 (en
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Volker Zang
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Individual
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    • 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
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/02—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of milling cutters
    • B24B3/021—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of milling cutters of milling cutters with helical cutting edges

Definitions

  • the invention relates to a grinding head for a tool grinding machine for helically grooved cutting tools according to the preamble of claim 1.
  • a grinding table which can be pivoted about a vertical axis is mounted on a longitudinal table for receiving the tool carrier, while the transverse table, which is movable transversely thereto, supports the grinding head carrier.
  • the workpiece to be grinded must be adjusted with the tool holder in relation to the grinding wheel so that the surface to be grinded coincides with the horizontal swivel axis of a faceplate defined by a stop finger.
  • the grinding wheel is adjusted by means of the mentioned carriage so that it touches the surface of the workpiece to be ground before the grinding process can be carried out.
  • the grinding wheel of such a grinding head is now set to the pitch angle of the cutting tool, the point of application of the grinding wheel during subsequent grinding moves out of the center of the axis cutting the cutting tool perpendicular to the axis of rotation, since during the grinding process of the cutting tool, the grinding wheel only moves along the vertical Z axis of the grinding head can be delivered.
  • a desired rake angle is therefore only possible by approximation by simultaneous infeed in the Z and Y axes. Until now, the size of these infeed movements could only be determined by trial grinding a cutting tool with subsequent measurement and a new correction of the setting values.
  • the invention has for its object to develop the grinding head of the known tool grinding machine in such a way that when grinding the rake angle of helically fluted cutting tools, only a single infeed movement along a single axis of the support carrying the grinding wheel can be generated depending on the center point of the cutting tool and its diameter, and so on to enable a linear contact between the rake face of the cutting tool and the grinding wheel and thus a feed movement of the grinding wheel which does not distort the rake angle of the cutting tool.
  • the rake angle is adjusted about a swivel axis which is related to the respective diameter of the tool to be ground and is adjustable so that the rake angle once set is retained even during the feed movement of the grinding wheel.
  • the grinding of a desired rake angle on spiral-fluted cutting tools is reproducible for the first time, for example according to a scale, and can also be automated for the first time.
  • Profile distortions for example in the case of conical milling tools, can also be compensated for, since the swivel axis can be adjusted during grinding, for example using stepper motors. Another advantage can be seen in the fact that, with the help of the same setting means, the grinding can also be removed in the correct shape is possible.
  • a grinding head is known from DE-PS 920 050, in which the grinding spindle carrying the grinding wheel is arranged in a grinding shaft bearing which can be pivoted about an axis which cuts the grinding spindle axis at right angles and which is carried by a feed carriage which is reciprocable along a horizontal axis is, which in turn is arranged pivotably about a vertical axis on a boom which can be pivoted about a horizontal axis, the boom being mounted to and fro by means of a slide guide on a vertical face plate which can be rotated about the horizontal axis, so as to achieve the desired feed movements of the grinding wheel according to a chosen clearance angle of the workpiece to be ground.
  • this grinding head can only be used to grind the front clearance angles on so-called cutter heads
  • the support that supports the grinding spindle can only be pivoted about a fixed axis and can therefore not be adjusted to the center point of a spiral-grooved cutting tool or its diameter.
  • the same rake angle errors would occur when grinding helically grooved cutting tools, as was explained at the beginning.
  • a workpiece headstock 16 with its tailstock 17 is mounted on the longitudinal slide 9 and carries a workpiece to be ground, namely a so-called twist-grooved milling cutter 20, on a spindle 19 clamped between centers.
  • the workpiece headstock can be moved back and forth in the direction of the arrows WL1 and WL2 along an axis labeled X1 and rotated in the direction of the arrows WD1 and WD2 about this axis.
  • the grinding head 15 comprises a grinding spindle 22 which is rotatably mounted in an infeed carriage 21 and on which a grinding wheel 23 to be assigned to the respective workpiece is mounted, the grinding surface of which has a cone angle K in the exemplary embodiment shown.
  • the back and forth along an axis designated by Y2 - arrows LY1, LY2 - slide 21 is rotatably supported on an angular swivel slide 25 about an axis X2 penetrating point D3 in the direction of arrows XD1 and XD2.
  • the swivel carriage 25 is in turn rotatably supported by its cross member 26 on the arm 24 of an adjusting slide 27 about an axis D2 penetrating the point D4 in the direction of the arrows ZS1 and ZS2.
  • the adjusting slide 27 is mounted in a slide guide 29 up and down along the axis labeled Z2 '.
  • the sledge guide 29 is pivoted about a pivot point denoted by D2, embodied by a bearing pin 10 fastened in the support arm 11 and in a semicircular groove 14 on the support arm 11 of the grinding head column 13, namely about the axis Z2 'in the direction of the arrows ZS3 and ZS4.
  • the slide guide 29 can be fixed in the respective setting position with the aid of a toggle screw 18.
  • the grinding head column 13 is also along an axis labeled Z1 - as already mentioned - up and down and along the arrows SKS1 and SKS2 and along an axis labeled Y1 back and forth in the stand 6, see arrows SKS3 and SKS4.
  • the arrangement of the various slides and their storage as well as their adjustability described above make it possible to align the grinding wheel 23 both on the axis X 1, that is on the center axis D 1 of the tool to be ground, and additionally on the point D 2, that is on the diameter of the tool to be ground , until X1 and D2 are vertically one above the other, and to pivot this point - bolt 10 - according to the rake angle of the tool to be grinded.
  • the respective setting that is, the pivoting in the direction of ZS3 and ZS4, the slide guide 29 is fixed by tightening the toggle screw 18.
  • the grinding wheel 23 is also pivoted according to its cone angle about the point D3 -axis Y2 -; see. Fig. 2. Only after these settings, the grinding wheel for generating the desired cutting surface is adjusted and driven in the usual way via the adjusting slide 27.
  • the axis Z2 'shown there thus represents the corrected infeed axis corresponding to the rake angle to be generated.
  • the point D2 is the point of intersection between the axes A1 and Z2, of which the axis A1 cuts the tool 20 to be ground in its center D1, while the axis Z2 the pivot points D4 - setting the pitch angle corresponding to the pitch of the spiral grooves of the tool 20 -, D3 - setting the cone angle K of the grinding wheel 23 - and D2 as the pivot point of the adjusting slide 29 cuts; these axes thus embody the rake angle of the tool 20 to be ground.
  • the grinding wheel 23 is thus pivoted about a further axis Z2 '(pivot point D2), which is axially parallel to the axis Z1 in the zero position, while it is only rotatable about the axis Z2 (pivot point D4), by means of its slide 21st , 24, 26, 27 and 29.
  • it is adjustable about the axis Y2 for the purpose of correcting its cone angle, namely about the pivot point D3.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Abstract

Schleifkopf (15) für eine Werkzeug-Schleifmaschine für das Schleifen von wendelgenuteten Schneidwerkzeugen (20) mit einer Schleifspindel (22), die über Stellschlitten (21, 25, 27) um zwei sich senk­recht schneidende Achsen sowie um eine dazu senkrecht lie­gende Achse dreh- bzw. schwenkbar sowie hin- und herbeweg­lich gelagert ist, wobei der die Zustellbewegung der auf der Schleifspindel (22) gelagerten Schleifscheibe (23) ermöglichende Stellschlitten (27, 29) an einem Träger (11) der Schleifkopfsäule (13) um einen Schwenkpunkt (D2) schwenkbar gelagert ist zwecks Einstel­lung der Schleifscheibe auf den Durchmesser des zu schlei­fenden Werkzeuges (20) und Einstellung des jeweils gewünschten Spanwinkels um diesen Schwenkpunkt (D2).

Figure imgaf001
Grinding head (15) for a tool grinding machine for grinding helically grooved cutting tools (20) with a grinding spindle (22), which rotates about two intersecting axes and an axis perpendicular to it via adjusting carriages (21, 25, 27). or is pivotable and can be moved back and forth, the adjusting slide (27, 29) enabling the feed movement of the grinding wheel (23) mounted on the grinding spindle (22) on a carrier (11) of the grinding head column (13) about a pivot point (D2 ) is pivotally mounted for the purpose of adjusting the grinding wheel to the diameter of the tool (20) to be ground and adjusting the desired rake angle around this pivot point (D2).
Figure imgaf001

Description

Die Erfindung betrifft einen Schleifkopf für eine Werkzeug­schleifmaschine für wendelgenutete Schneidwerkzeuge gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a grinding head for a tool grinding machine for helically grooved cutting tools according to the preamble of claim 1.

Bei einer solchen Universal-Werkzeug-Schleifmaschine ist neben dem senkrecht stehenden Schleifkopfträger auf einem Längstisch ein um eine senkrechte Achse schwenkbarer Schleiftisch zur Aufnahme des Werkzeugträgers gelagert, während der quer dazu bewegliche Quertisch den Schleif­kopfträger lagert. Das zu schleifende Werkstück ist über den Werkzeugträger in bezug auf die Schleifscheibe jeweils so einzustellen, daß die zu schleifende Fläche mit der durch einen Anschlagfinger definierten waagerechten Schwenkachse einer Planscheibe zusammenfällt. Die Schleif­scheibe wird mittels der genannten Schlitten so einge­stellt, daß sie die zu schleifende Fläche des Werkstückes berührt, ehe der Schleifvorgang durchgeführt werden kann. Wird nun die Schleifscheibe eines solchen Schleifkopfes auf den Steigungswinkel des Schneidwerkzeuges eingestellt, so verfährt der Angriffspunkt der Schleifscheibe beim nachfolgenden Schleifen aus der das Schneidwerkzeug senk­recht zur Drehachse schneidenden Achsmitte heraus, da während des Schleifvorganges des Schneidwerkzeuges die Schleifscheibe nur längs der senkrecht stehenden Z-Achse des Schleifkopfes zugestellt werden kann. Ein gewünschter Spanwinkel ist daher lediglich durch eine Annäherung durch gleichzeitiges Zustellen in der Z- und in der Y-Achse mög­lich. Die Größe dieser Zustellbewegungen sind bisher nur durch Probeschliffe eines Schneidwerkzeuges mit nachfol­gendem Messen und erneuter Korrektur der Einstellwerte zu ermitteln. Mit anderen Worten: Da die Vorschubbewegungen der Supporte auf den Durchmesser des zu schleifenden Werk­zeuges eingestellt werden müssen, bei der vorbekannten Anordnung jedoch auf dem Achsmittelpunkt des Fräses zu be­ziehen sind, können die Spanwinkel wendelgenuteter Schneid­werkzeuge mit einer solchen Werkzeugschleifmaschine nur annäherndweise geschliffen werden. Dies bedeutet ferner, daß bei NC-gesteuertem Schleifen ständig variierende Spanwinkel am zu schleifenden Schneidwerkzeug erzeugt werden.In such a universal tool grinding machine, in addition to the vertical grinding head carrier, a grinding table which can be pivoted about a vertical axis is mounted on a longitudinal table for receiving the tool carrier, while the transverse table, which is movable transversely thereto, supports the grinding head carrier. The workpiece to be grinded must be adjusted with the tool holder in relation to the grinding wheel so that the surface to be grinded coincides with the horizontal swivel axis of a faceplate defined by a stop finger. The grinding wheel is adjusted by means of the mentioned carriage so that it touches the surface of the workpiece to be ground before the grinding process can be carried out. If the grinding wheel of such a grinding head is now set to the pitch angle of the cutting tool, the point of application of the grinding wheel during subsequent grinding moves out of the center of the axis cutting the cutting tool perpendicular to the axis of rotation, since during the grinding process of the cutting tool, the grinding wheel only moves along the vertical Z axis of the grinding head can be delivered. A desired rake angle is therefore only possible by approximation by simultaneous infeed in the Z and Y axes. Until now, the size of these infeed movements could only be determined by trial grinding a cutting tool with subsequent measurement and a new correction of the setting values. In other words: Since the feed movements of the supports have to be adjusted to the diameter of the tool to be ground, but in the known arrangement they have to be based on the center of the axis of the milling cutter, the rake angles of helically grooved cutting tools can only be achieved with such a tool grinding machine be roughly ground. This also means that with NC-controlled grinding, constantly varying rake angles are generated on the cutting tool to be ground.

Der Erfindung liegt die Aufgabe zugrunde, den Schleifkopf der vorbekannten Werkzeugschleifmaschine derart weiterzu­bilden, daß beim Schleifen der Spanwinkel von wendelge­nuteten Schneidwerkzeugen lediglich eine einzige Zustell­bewegung längs einer einzigen Achse des die Schleifscheibe tragenden Supportes abhängig von dem Mittelpunkt des Schneidwerkzeuges und seines Durchmessers erzeugbar ist, um so eine linienförmige Berührung zwischen Spanfläche des Schneidwerkzeuges und der Schleifscheibe und damit eine den Spanwinkel des Schneidwerkzeuges nicht verfälschende Zustellbewegung der Schleifscheibe zu ermöglichen.The invention has for its object to develop the grinding head of the known tool grinding machine in such a way that when grinding the rake angle of helically fluted cutting tools, only a single infeed movement along a single axis of the support carrying the grinding wheel can be generated depending on the center point of the cutting tool and its diameter, and so on to enable a linear contact between the rake face of the cutting tool and the grinding wheel and thus a feed movement of the grinding wheel which does not distort the rake angle of the cutting tool.

Diese Aufgabe ist gemäß der Erfindung durch die kennzeich­nenden Merkmale des Patentanspruchs 1 gelöst.This object is achieved according to the invention by the characterizing features of patent claim 1.

Weitere Merkmale der Erfindung ergeben sich aus den Unter­ansprüchen.Further features of the invention emerge from the subclaims.

Durch die erfindungsgemäße Ausbildung erfolgt die Einstel­lung des Spanwinkels um eine Schwenkachse, die auf den jeweiligen Durchmesser des zu schleifenden Werkzeuges be­zogen und einstellbar ist, so daß der einmal eingestellte Spanwinkel auch während der Zustellbewegung der Schleif­scheibe beibehalten bleibt. Auf diese Weise ist das Schlei­fen eines gewünschten Spanwinkels von wendelgenuteten Schneidwerkzeugen erstmals exakt, zum Beispiel nach Skala, reproduzierbar und kann ferner erstmals automatisiert werden. Auch können Profilverzerrungen zum Beispiel bei konischen Fräswerkzeugen ausgeglichen werden, da die Schwenkachse während des Schleifens, zum Beispiel über Schrittmotoren,nachgestellt werden kann. Ein weiterer Vor­teil ist darin zu sehen, daß mit Hilfe der gleichen Ein­stellmittel auch ein formgerechtes Abziehen der Schleif­ scheibe möglich ist.Due to the design according to the invention, the rake angle is adjusted about a swivel axis which is related to the respective diameter of the tool to be ground and is adjustable so that the rake angle once set is retained even during the feed movement of the grinding wheel. In this way, the grinding of a desired rake angle on spiral-fluted cutting tools is reproducible for the first time, for example according to a scale, and can also be automated for the first time. Profile distortions, for example in the case of conical milling tools, can also be compensated for, since the swivel axis can be adjusted during grinding, for example using stepper motors. Another advantage can be seen in the fact that, with the help of the same setting means, the grinding can also be removed in the correct shape is possible.

Es ist zwar aus der DE-PS 920 050 ein Schleifkopf bekannt, bei dem die die Schleifscheibe tragende Schleifspindel in einer um eine die Schleifspindelachse im rechten Winkel schneidende Achse schwenkbaren Schleifwellenlagerung an­geordnet ist, die von einem längs einer waagerechten Achse hin- und herbeweglichen Vorschubschlitten getragen ist, der seinerseits um eine senkrechte Achse schwenkbar an einem un eine waagerechte Achse schwenkbaren Ausleger an­geordnet ist, wobei der Ausleger mittels einer Schlitten­führung an einer senkrechten, um die waagerechte Achse drehbaren Planscheibe hin- und herbeweglich gelagert ist, um so die gewünschten Zustellbewegungen der Schleifscheibe entsprechend einem gewählten Freiwinkel des zu schleifen­den Werkstückes zu ermöglichen.A grinding head is known from DE-PS 920 050, in which the grinding spindle carrying the grinding wheel is arranged in a grinding shaft bearing which can be pivoted about an axis which cuts the grinding spindle axis at right angles and which is carried by a feed carriage which is reciprocable along a horizontal axis is, which in turn is arranged pivotably about a vertical axis on a boom which can be pivoted about a horizontal axis, the boom being mounted to and fro by means of a slide guide on a vertical face plate which can be rotated about the horizontal axis, so as to achieve the desired feed movements of the grinding wheel according to a chosen clearance angle of the workpiece to be ground.

Abgesehen davon, daß mit diesem Schleifkopf nur die stirn­seitigen Freiwinkel an sogenannten Messerköpfen formgerecht geschliffen werden können, ist der die Schleifspindel tra­gende Support lediglich um eine feststehende Achse schwenk­bar und kann daher weder auf den Achsmittelpunkt eines wendelgenuteten Schneidwerkzeuges noch auf dessen Durch­messer eingestellt werden. Bei einer solchen Ausbildung würden beim Schleifen von wendelgenuteten Schneidwerkzeugen die gleichen Spanwinkelfehler auftreten, wie dies eingangs erläutert worden ist.Apart from the fact that this grinding head can only be used to grind the front clearance angles on so-called cutter heads, the support that supports the grinding spindle can only be pivoted about a fixed axis and can therefore not be adjusted to the center point of a spiral-grooved cutting tool or its diameter. With such a design, the same rake angle errors would occur when grinding helically grooved cutting tools, as was explained at the beginning.

Die Erfindung ist nachfolgend anhand eines in der Zeichnung mehr oder minder schematisch dargestellten Ausführungs­beispiels beschrieben. Es zeigen:

  • Figur 1 eine Seitenansicht einer Schleifkopfsäule, Schleifkopf und Werkstück-Spindelstock umfassenden Teils einer nur teilweise dargestellten Werk­zeug-Schleifmaschine gemäß der Erfindung,
  • Figur 2 eine Vorderansicht des in Figur 1 dargestellten Teils der Werkzeug-Schleifmaschine und
  • Figur 3 eine Draufsicht auf den Teil der Werkzeug­Schleifmaschine gemäß Figur 1.
The invention is described below with reference to an embodiment shown more or less schematically in the drawing. Show it:
  • 1 shows a side view of a grinding head column, grinding head and workpiece headstock comprising a part of a tool grinding machine according to the invention which is only partially shown,
  • Figure 2 is a front view of the part of the tool grinding machine shown in Figure 1 and
  • 3 shows a plan view of the part of the tool grinding machine according to FIG. 1.

Auf einem hier nicht näher dargestellten Ständer 6 einer insgesamt mit der Bezugsziffer 7 bezeichneten Werkzeug-­Schleifmaschine befinden sich ein Schlittenbett 8 für einen Längsschlitten 9 und eine einen abgewinkelten Trag­arm 11 aufweisende, höhenverstellbare Schleifkopfsäule 13 als Träger für den eigentlichen, insgesamt mit der Bezugs­ziffer 15 bezeichneten Schleifkopf; vgl. Figur 2.On a stand 6, not shown here in more detail, of a tool grinding machine, designated overall by reference number 7, there is a slide bed 8 for a longitudinal slide 9 and a height-adjustable grinding head column 13, which has an angled support arm 11, as a support for the actual, generally designated by reference number 15 Grinding head; see. Figure 2.

Auf dem Längsschlitten 9 ist ein Werkstück-Spindelstock 16 mit seinem Reitstock 17 gelagert und trägt auf einer zwi­schen Spitzen eingespannten Spindel 19 ein zu schleifendes Werkstück, nämlich einen sogenannten drallgenuteten Walzenfräser 20. Über hier nicht dargestellte Antriebe, die auch NC-gesteuert sein können, kann der Werkstück-­Spindelstock in Richtung der Pfeile WL₁ und WL₂ längs einer mit X₁ bezeichneten Achse hin- und herbewegt und in Rich­tung der Pfeile WD₁ und WD₂ um diese Achse gedreht werden. Der Schleifkopf 15 umfaßt eine in einem Zustell-Schlitten 21 drehbar gelagerte Schleifspindel 22, auf der eine dem jeweiligen Werkstück zuzuordnende Schleifscheibe 23 gela­gert ist, deren Schleiffläche im dargestellten Ausführungs­beispiel einen Kegelwinkel K aufweist. Der längs einer mit Y₂ bezeichneten Achse hin- und herbewegliche - Pfeile LY₁, LY₂ - Schlitten 21 ist auf einem winkelförmigen Schwenk-­Schlitten 25 um eine den Punkt D₃ durchstoßende Achse X₂ in Richtung der Pfeile XD₁ und XD₂ drehbar gelagert. Der Schwenk-Schlitten 25 ist seinerseits mittels seiner Tra­verse 26 an dem Arm 24 eines Stellschlittens 27 um eine den Punkt D₄ durchstoßende Achse Z₂ in Richtung der Pfeile ZS₁ und ZS₂ drehbar gelagert. Der Stellschlitten 27 ist in einer Schlittenführung 29 längs der mit Z₂' bezeichneten Achse auf- und abbeweglich gelagert. Die Schlittenführung 29 ist um einen mit D₂ bezeichneten Schwenkpunkt, verkör­pert durch einen im Tragarm 11 befestigten Lagerbolzen 10 und in einer halbkreisförmigen Nut 14 am Tragarm 11 der Schleifkopfsäule 13 schwenkbar gelagert, und zwar um die Achse Z₂' in Richtung der Pfeile ZS₃ und ZS₄. Mit Hilfe einer Knebelschraube 18 kann die Schlittenführung 29 in der jeweiligen Einstellage festgelegt werden.A workpiece headstock 16 with its tailstock 17 is mounted on the longitudinal slide 9 and carries a workpiece to be ground, namely a so-called twist-grooved milling cutter 20, on a spindle 19 clamped between centers. Drives not shown here, which can also be NC-controlled, the workpiece headstock can be moved back and forth in the direction of the arrows WL₁ and WL₂ along an axis labeled X₁ and rotated in the direction of the arrows WD₁ and WD₂ about this axis. The grinding head 15 comprises a grinding spindle 22 which is rotatably mounted in an infeed carriage 21 and on which a grinding wheel 23 to be assigned to the respective workpiece is mounted, the grinding surface of which has a cone angle K in the exemplary embodiment shown. The back and forth along an axis designated by Y₂ - arrows LY₁, LY₂ - slide 21 is rotatably supported on an angular swivel slide 25 about an axis X₂ penetrating point D₃ in the direction of arrows XD₁ and XD₂. The swivel carriage 25 is in turn rotatably supported by its cross member 26 on the arm 24 of an adjusting slide 27 about an axis D₂ penetrating the point D₄ in the direction of the arrows ZS₁ and ZS₂. The adjusting slide 27 is mounted in a slide guide 29 up and down along the axis labeled Z₂ '. The sledge guide 29 is pivoted about a pivot point denoted by D₂, embodied by a bearing pin 10 fastened in the support arm 11 and in a semicircular groove 14 on the support arm 11 of the grinding head column 13, namely about the axis Z₂ 'in the direction of the arrows ZS₃ and ZS₄. The slide guide 29 can be fixed in the respective setting position with the aid of a toggle screw 18.

Die Schleifkopfsäule 13 ist ebenfalls längs einer mit Z₁ bezeichneten Achse - wie bereits erwähnt - auf- und ab­beweglich sowie längs der Pfeile SKS₁ und SKS₂ und längs einer mit Y₁ bezeichneten Achse hin- und herbeweglich im Ständer 6 gelagert, siehe Pfeile SKS₃ und SKS₄.The grinding head column 13 is also along an axis labeled Z₁ - as already mentioned - up and down and along the arrows SKS₁ and SKS₂ and along an axis labeled Y₁ back and forth in the stand 6, see arrows SKS₃ and SKS₄.

Die vorstehend beschriebenen Anordnung der verschiedenen Schlitten und ihrer Lagerung sowie deren Verstellbarkeit ermöglichen, die Schleifscheibe 23 sowohl auf die Achse X₁, also auf die Achsmitte D₁ des zu schleifenden Werk­zeuges, und zusätzlich auf den Punkt D₂, also auf den Durchmesser des zu schleifenden Werkzeuges auszurichten, bis X₁ und D₂ senkrecht übereinander stehen, und um diesen Punkt - Bolzen 10 - entsprechend dem jeweils einzuhalten­den Spanwinkel des zu schleifenden Werkzeuges zu verschwen­ken. Die jeweilige Einstellung, also die Verschwenkung in Richtung ZS₃ und ZS₄, der Schlittenführung 29, wird durch Festziehen der Knebelschraube 18 fixiert. Über den Schwenk­schlitten 25 wird ferner die Schleifscheibe 23 entspre­chend ihrem Kegelwinkel zusätzlich um den Punkt D₃ -­Achse Y₂ - verschwenkt; vgl. Fig. 2. Erst nach diesen Ein­stellungen wird die Schleifscheibe zur Erzeugung der ge­wünschten Schneidfläche über den Stellschlitten 27 in üb­licher Weise zugestellt und angetrieben. Die dort darge­stellte Achse Z₂' stellt also die dem zu erzeugenden Spanwin­kel entsprechende korrigierte Zustellachse dar.The arrangement of the various slides and their storage as well as their adjustability described above make it possible to align the grinding wheel 23 both on the axis X 1, that is on the center axis D 1 of the tool to be ground, and additionally on the point D 2, that is on the diameter of the tool to be ground , until X₁ and D₂ are vertically one above the other, and to pivot this point - bolt 10 - according to the rake angle of the tool to be grinded. The respective setting, that is, the pivoting in the direction of ZS₃ and ZS₄, the slide guide 29 is fixed by tightening the toggle screw 18. About the swivel slide 25, the grinding wheel 23 is also pivoted according to its cone angle about the point D₃ -axis Y₂ -; see. Fig. 2. Only after these settings, the grinding wheel for generating the desired cutting surface is adjusted and driven in the usual way via the adjusting slide 27. The axis Z₂ 'shown there thus represents the corrected infeed axis corresponding to the rake angle to be generated.

Aus der Figur 2 ist deutlich erkennbar, daß der Punkt D₂ der Kreuzungspunkt zwischen den Achsen A₁ und Z₂ ist, von denen die Achse A₁ das zu schleifende Werkzeug 20 in seinem Mittelpunkt D₁ schneidet, während die Achse Z₂ die Schwenk­ punkte D₄ - Einstellung des Steigungswinkels entsprechend der Steigung der Wendelnuten des Werkzeuges 20 -, D₃ - Einstellung des Kegelwinkels K der Schleifscheibe 23 - ­und D₂ als Schwenkpunkt des Stellschlittens 29 schneidet; diese Achsen verkörpern somit den zu schleifenden Span­winkel des Werkzeuges 20.From Figure 2 it can be clearly seen that the point D₂ is the point of intersection between the axes A₁ and Z₂, of which the axis A₁ cuts the tool 20 to be ground in its center D₁, while the axis Z₂ the pivot points D₄ - setting the pitch angle corresponding to the pitch of the spiral grooves of the tool 20 -, D₃ - setting the cone angle K of the grinding wheel 23 - and D₂ as the pivot point of the adjusting slide 29 cuts; these axes thus embody the rake angle of the tool 20 to be ground.

Die Schleifscheibe 23 ist also um eine weitere Achse Z₂' (Schwenkpunkt D₂), die in der Nullage achsparallel zur Achse Z₁ liegt, schwenkbar gelagert, während sie um die Achse Z₂ lediglich drehbar (Drehpunkt D₄) gelagert ist, und zwar mittels ihrer Schlitten 21, 24, 26, 27 und 29. Darüber hinaus ist sie um die Achse Y₂ zwecks Korrektur ihres Kegelwinkels, nämlich um den Drehpunkt D₃,einstell­bar.The grinding wheel 23 is thus pivoted about a further axis Z₂ '(pivot point D₂), which is axially parallel to the axis Z₁ in the zero position, while it is only rotatable about the axis Z₂ (pivot point D₄), by means of its slide 21st , 24, 26, 27 and 29. In addition, it is adjustable about the axis Y₂ for the purpose of correcting its cone angle, namely about the pivot point D₃.

Ferner ist, wie an sich bekannt, der Abstand der Achsen Z₁ und A₁ - Figur 2 - sowie der Abstand der Drehpunkte D₁ und D₂ - vgl. auch Figur 1 - über maschinengestellfeste Lineale ablesbar, die gegebenenfalls zwecks NC-Steuerung des Schleifkopfes elektronisch oder opto-elektronisch ables­bare Marken tragen.Furthermore, as is known per se, the distance between the axes Z₁ and A₁ - Figure 2 - and the distance between the pivot points D₁ and D₂ - see. also Figure 1 - readable on machine frame-fixed rulers, which may have electronically or opto-electronically readable marks for the purpose of NC control of the grinding head.

Claims (6)

1. Schleifkopf für eine Werkzeugschleifmaschine für wendelgenutete Schneidwerkzeuge mit einer über um zwei sich senkrecht schneidende Achsen dreh- bzw. schwenkbar und längs der senkrechten Achse auf- und ab- sowie drehbeweglich gelagerten Schlitten ange­ordneten Schleifspindel für eine Schleifscheibe, dadurch gekennzeichnet, daß die Schwenkachse (D₂) zur Einstellung des Spanwinkels des zu schleifenden Schneidwerkzeuges (20) jeweils auf den Durchmesser des Schneidwerkzeuges höhenver­stellbar ausgebildet und in der jeweiligen Einstellung zustellbar gelagert ist.1. Grinding head for a tool grinding machine for helically grooved cutting tools with a grinding spindle for a grinding wheel, which can be rotated or swiveled about two perpendicularly intersecting axes and up and down and rotatably mounted slide along the vertical axis, characterized in that the pivot axis ( D₂) for adjusting the rake angle of the cutting tool (20) to be ground is designed such that it is adjustable in height to the diameter of the cutting tool and can be delivered in the respective setting. 2. Schleifkopf nach Anspruch 1, dadurch gekenn­zeichnet, daß zwecks Einstellung des Span­winkels der die Schleifspindel (22) tragende Schlit­ten (21) an einem um eine die senkrechte Achse (Z₁) des Schleifkopfes (15) rechtwinklig schneidenden Achse (D₂) schwenkbar lagert und der lagernde Support (25) längsverschieblich an einem achsparallel zur senk­rechten Achse (Z₁) angeordneten Schleifkopfsäule (13) gelagert ist.2. Grinding head according to claim 1, characterized in that for the adjustment of the rake angle of the grinding spindle (22) carrying carriage (21) on a about a vertical axis (Z₁) of the grinding head (15) perpendicularly intersecting axis (D₂) and pivotally mounted the supporting support (25) is mounted longitudinally displaceably on a grinding head column (13) arranged parallel to the vertical axis (Z 1). 3. Schleifkopf nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß der die Schleif­spindel (22) tragende Schlitten (21) um eine zusätz­liche Achse (D₃) zwecks Einstellung des Kegelwinkels der Schleifscheibe (23) schwenkbar gelagert ist.3. Grinding head according to claims 1 and 2, characterized in that the carriage (21) carrying the grinding spindle (22) about an additional axis (D₃) for the adjustment of the cone angle of the grinding wheel (23) is pivotally mounted. 4. Schleifkopf nach den Ansprüchen 1 bis 3, dadurch ge­kennzeichnet, daß die Höhenverstellung der Achse (D₂) über die Stellmittel für die Höhenver­stellung (Z₁) der Schleifkopfsäule (13) durchführbar ist.4. Grinding head according to claims 1 to 3, characterized in that the height adjustment of the axis (D₂) via the adjusting means for the height adjustment (Z₁) of the grinding head column (13) can be carried out. 5. Schleifkopf nach den Ansprüchen 1 bis 4, dadurch ge­kennzeichnet, daß die Einstellung des Schwenkpunktes (D₂) des Schleifkopfes (15) und des Werkzeug-Mittelpunktes (D₁) in eine gemeinsame senk­rechte Achse (A₁) über die Stellmittel zum Bewegen der Schleifkopfsäule (13) längs einer Achse (Y₁) erfolgt.5. Grinding head according to claims 1 to 4, characterized in that the adjustment of the pivot point (D₂) of the grinding head (15) and the tool center (D₁) in a common vertical axis (A₁) via the adjusting means for moving the grinding head column ( 13) along an axis (Y₁). 6. Schleifkopf nach den Ansprüchen 1 bis 5, dadurch ge­kennzeichnet, daß die Zustellung der Schleifscheibe (23) in der jeweils fixierten Einstell­lage längs einer Achse (Z₂') mittels eines an einem Tragarm (11) der Schleifkopfsäule (13) schwenkeinstell­bar gelagerten Schlittens (27, 29) erfolgt.6. Grinding head according to claims 1 to 5, characterized in that the infeed of the grinding wheel (23) in the respectively fixed setting position along an axis (Z₂ ') by means of a carriage which is pivotably mounted on a support arm (11) of the grinding head column (13) ( 27, 29).
EP86108703A 1985-10-31 1986-06-26 Grinding head for a machine for sharpening helically-fluted cutting tools Withdrawn EP0220375A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3538795 1985-10-31
DE19853538795 DE3538795A1 (en) 1985-10-31 1985-10-31 GRINDING HEAD FOR A TOOL GRINDING MACHINE FOR SPIRAL SLOTED CUTTING TOOLS

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EP0220375A2 true EP0220375A2 (en) 1987-05-06
EP0220375A3 EP0220375A3 (en) 1988-12-14

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EP (1) EP0220375A3 (en)
JP (1) JPS6362648A (en)
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0328034A2 (en) * 1988-02-10 1989-08-16 Guehring Automation GmbH Tool-grinding machine

Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
US6234881B1 (en) * 1998-08-06 2001-05-22 Walter Ag Grinding machine for forming chip-producing cutting tools
JP4577351B2 (en) 2007-11-29 2010-11-10 トヨタ自動車株式会社 Torque fluctuation absorber
US10092994B2 (en) * 2011-03-24 2018-10-09 Erwin Junker Maschinenfabrik Gmbh Grinding machine with pivotable mounting of a grinding spindle
CN103495919A (en) * 2013-10-11 2014-01-08 平湖市山特螺纹工具有限公司 Sliding table of groove milling machine

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DE920050C (en) * 1952-02-03 1955-03-07 Walter Richard R Walter Fa Tool grinding machine
DE2828168A1 (en) * 1977-06-28 1979-01-11 Huffman S E Corp NUMERICALLY CONTROLLED GRINDING MACHINE

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US3680263A (en) * 1970-06-03 1972-08-01 Huffman S E Corp Method and apparatus for grinding end cutting tools
JPS59219156A (en) * 1983-05-25 1984-12-10 Makino Furaisu Seiki Kk Setting method of grinding position in tool grinder and device thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE920050C (en) * 1952-02-03 1955-03-07 Walter Richard R Walter Fa Tool grinding machine
DE2828168A1 (en) * 1977-06-28 1979-01-11 Huffman S E Corp NUMERICALLY CONTROLLED GRINDING MACHINE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0328034A2 (en) * 1988-02-10 1989-08-16 Guehring Automation GmbH Tool-grinding machine
EP0328034A3 (en) * 1988-02-10 1991-05-02 Guehring Automation GmbH Tool-grinding machine

Also Published As

Publication number Publication date
US4817338A (en) 1989-04-04
EP0220375A3 (en) 1988-12-14
DE3538795A1 (en) 1987-05-07
JPS6362648A (en) 1988-03-18

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