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EP0072887A1 - Programme-controlled tool guiding machine - Google Patents

Programme-controlled tool guiding machine Download PDF

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Publication number
EP0072887A1
EP0072887A1 EP82100857A EP82100857A EP0072887A1 EP 0072887 A1 EP0072887 A1 EP 0072887A1 EP 82100857 A EP82100857 A EP 82100857A EP 82100857 A EP82100857 A EP 82100857A EP 0072887 A1 EP0072887 A1 EP 0072887A1
Authority
EP
European Patent Office
Prior art keywords
grinding
tool
spindle
axis
horizontal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP82100857A
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German (de)
French (fr)
Other versions
EP0072887B1 (en
Inventor
Willi Motzer
Horst Dr.-Ing. Bräuning
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Walter Montanwerke GmbH
Original Assignee
Walter Montanwerke GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Walter Montanwerke GmbH filed Critical Walter Montanwerke GmbH
Priority to AT82100857T priority Critical patent/ATE11500T1/en
Publication of EP0072887A1 publication Critical patent/EP0072887A1/en
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Publication of EP0072887B1 publication Critical patent/EP0072887B1/en
Expired legal-status Critical Current

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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
    • B24B27/00—Other grinding machines or devices
    • B24B27/0061—Other grinding machines or devices having several tools on a revolving tools box
    • 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
    • B24B3/06—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of milling cutters of face or end milling cutters or cutter heads, e.g. of shank type
    • B24B3/065—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of milling cutters of face or end milling cutters or cutter heads, e.g. of shank type end milling cutters with rounded ends

Definitions

  • the machine relates to a program-controlled tool grinding machine for grinding concentric tools, for example milling cutters and drills, with an adjustable on a machine frame along a first vertical axis (Y) and rotatable about this grinding head, which drives a driven with its axis pivotably in a vertical swivel plane and has a first grinding spindle carrying a grinding wheel at the end, and with a tool holder arranged on the machine frame at a distance from the grinding head on a rotary table, which has a cross slide that can be pivoted about the second vertical axis (C) defined by the rotary table and is adjustable in a horizontal plane, on which a tool-holding spindle coupled to a program-controlled drive device is rotatably mounted, the rotary table along a first horizontal axis (X) running transversely to the grinding head and the grinding head along one perpendicular to the first n horizontal horizontal axis (X) extending second horizontal axis (Z) are adjustable and at least the grinding head is program
  • the cutting of the front teeth By appropriate rotation of the in the recording spindle-clamped tool during the grinding process, the cutting of the front teeth, starting from the tool axis, can be ground towards the circumference of the tool.
  • this machine does not allow, for example, the manufacture or machining of the spiral grooves present on the circumference of the tool body.
  • the flutes could not be ground into the blank from the solid, nor the clearance angle on the cylindrical cutting edges and then ground in the radius area. Therefore, in order to finish machining such a tool, several different grinding machines have to be used in succession, for which the tool has to be re-clamped and aligned each time.
  • the grinding head can also be pivoted about a vertical axis in order to achieve a greater variety of possible uses , but this is paid for with a mechanically very complicated construction of the machine. Since all grinding operations are carried out with a single grinding wheel provided on the grinding head , this results in relatively complicated adjusting movements for the grinding spindle - this grinding wheel, although it is not easily possible to grind spiral-fluted end mills at all points in one setting.
  • the grinding wheel must have a complicated shape because with this one grinding wheel the ver different surfaces on which milling cutters have to be ground.
  • This shaped grinding wheel is not economical both in terms of setting up relative to the milling cutter and in terms of the wear behavior of the grinding wheel. Commercial standard grinding wheels cannot therefore be used.
  • a numerically controlled tool grinding machine has become known in practice, the grinding head of which carries two grinding disks located opposite one another at a fixed distance and at a fixed angle, which allow the grinding work to be divided.
  • This machine which is also intended for grinding end mills in particular, does not allow all grinding work to be carried out on more complicated tools that are circumferential and end-end-cutting, unless it is designed with 8 axes of movement, which in turn means a very high outlay .
  • the object of the invention is therefore to provide a program-controlled tool grinding machine which allows all grinding operations, including the spiral grooves on the circumference and forehead, to be carried out automatically under program control with a tool clamping, with comparatively little technical effort, even with more complicated tools, for example with a radius milling cutter.
  • the tool grinding machine mentioned at the outset is characterized according to the invention in that the grinding head has at least three separate grinding wheels which are seated on at least two separately driven spindles and are program-controlled in succession in the correct one spatial alignment can be brought into engagement with the tool, and that at least one of the spindles is arranged with its axis lying substantially in a horizontal plane.
  • the grinding head has at least three grinding wheels, all grinding work occurring with rotating tools can be carried out automatically by adjusting the grinding spindles of the grinding head and the tool holder without the machine having to have an excessive number of axes of motion that control, programming and also the increase the mechanical construction of the machine significantly.
  • the new tool grinding machine only requires 6 axes of movement, 3 of which are each assigned to a rotary movement and 3 to a translatory movement.
  • Each of the grinding wheels can be assigned its own grinding spindle, but the arrangement can also be such that, for example, two grinding wheels are arranged at each end on the horizontal grinding spindle. Similarly, two grinding wheels can also be provided at each end on the first grinding spindle, which is pivotable in the vertical plane. Since the first grinding spindle with its axis, starting from a vertical position, can be fluctuated and at least one further grinding spindle with its axis is arranged essentially horizontally, so that these two grinding spindles intersect at right angles in space in the starting position, relatively small adjustment paths result from the mentioned starting positions in order to transfer the grinding wheels into the correct spatial position for the respective grinding process.
  • the vertical plane containing the first grinding spindle axis and the other horizontal grinding spindle lie on different sides of the first vertical axis about which the grinding head can be rotated. This makes it possible to achieve relatively small adjusting movements of both the tool carrier and the grinding head during the transition between the individual machining operations of the tool. As a result, the unproductive idle times are also very short, which also increases the machine's economy.
  • the horizontal grinding spindle is pivotally mounted about a transverse horizontal axis, so that, for example, to grind the clearance angle on the cylindrical cutting edges of a radius cutter, the cup grinding wheel seated on this grinding spindle by a certain small angle in the order of 10 ° can be tilted.
  • the arrangement can also be such that the first grinding spindle with its pivot plane is mounted such that it can be tilted about a horizontal axis running at a distance from it, which increases the variety of setting options.
  • the first grinding spindle and / or the horizontal grinding spindle are expediently connected to their drive motor to form a jointly adjustable unit, while the grinding head itself is designed to be pivotable by at least 180 ° about the first vertical axis.
  • the program-controlled tool grinding machine shown in FIGS. 1 to 4 has a machine frame 1 on which a first slide 2 is displaceably mounted along a first horizontal axis X.
  • the first slide 2 carries a rotary table 3 with a vertical axis of rotation C, on which a cross slide consisting of a longitudinal and transverse support 4 or 5 is fastened at the end.
  • the cross support 5 in turn carries a spindle housing 6 which is aligned parallel to the longitudinal support 4 and in which a tool holder spindle 7 is rotatably mounted.
  • the spindle housing 6 is held between two jaws 8 and fixed by means of set screws 9. After loosening the set screws 9, it can be pivoted about a horizontal axis 10, so that the axis of the tool holding spindle 7 receives a corresponding inclination with respect to the horizontal.
  • a reduction gear 11 is flanged to the spindle housing 6, onto which a stepping motor 12 is placed, which can drive the tool holding spindle 7 about its axis of rotation A via the reduction gear 11, as indicated by an arrow 13 (FIG. 1).
  • the R is assigned undtisch 3 via a reduction gear 14 (Fig. 2), a second stepping motor 15 which allows to programmatically the rotary table 3 and hence the seated thereon cross slide about the vertical axis C to rotate, as indicated by in Fig. 1 an arrow 16 is indicated.
  • the carriage 2 carrying the rotary table 3 is also coupled via a corresponding reduction gear (not shown further) to a program-controlled stepping motor 16 (FIG. 2), which allows to move the rotary table 3 and the tool carrier arranged thereon, described above and consisting of the cross slide, the spindle housing 6 of the tool holder 7 and the stepping motor 12 with the associated reduction gear 11, along the first horizontal axis X in accordance with the program.
  • a program-controlled stepping motor 16 FIG. 2
  • the longitudinal support 4 of the cross slide can be adjusted by hand by actuating a handwheel 17 (FIG. 2), while the adjustment of the transverse support 5 by a corresponding handwheel 18 (FIG. 4) can also be done by hand.
  • a handwheel 17 (FIG. 2)
  • a corresponding handwheel 18 (FIG. 4)
  • a second carriage 19 is mounted so as to be longitudinally displaceable along a second horizontal axis Z, which runs at right angles to the first horizontal axis X, along which the rotary table is displaceable.
  • a height-adjustable column 20 on which a grinding head 21 is arranged is mounted on the second carriage 19.
  • the second carriage 19 can also be shifted along the second horizontal axis Z in a program-controlled manner by a stepping motor 23 (FIG. 2) via a reduction gear 22.
  • the actual grinding head 21 is mounted and rotatably mounted on the height-adjustable column 20, the height of which is adjusted along a Y-axis via a (FIG. 3) program-controlled stepping motor 27a which is flanged to a reduction gear 26.
  • the base 25 is via a second reduction gear contained in the housing of the reduction gear 26 by a stepping motor 27 which is also flanged on Vertical axis B (Fig. 1, 2), starting from an initial position illustrated in Fig.1, rotatable in both directions by at least 18 0 °.
  • a mounting plate 29 is fastened on it by means of bearing parts 28, which carries a clamping surface lying in a horizontal plane, on which a first grinding unit 32 is pivotally mounted about a horizontal axis 33 via a rotary plate 31.
  • the first grinding unit 32 has a first grinding spindle which can be pivoted with its axis 34 in a vertical plane about the axis 33, which carries a grinding wheel 35 at the end and is driven by an electric motor 36 which forms part of the grinding unit 32 and is firmly coupled to it.
  • the first grinding spindle 37 can be pivoted about the horizontal axis 33, for example about the spiral angle of a tool to be ground; for example up to plus or minus 50 °.
  • the entire grinding unit 32 can, if necessary, be pivoted together with the mentioned pivoting plane of the axis 34 of the grinding spindle 37 about the other horizontal axis 30. Both swiveling movements can be carried out by hand; Normally, the two pivot axes 33, 30 are assigned stepping motors equipped with corresponding reduction gears, as indicated at 38 and 39 in FIG. 1.
  • a second grinding unit 40 Arranged on the side of the vertical axis B opposite the first grinding unit 32 is a second grinding unit 40 which has a second grinding spindle 41 which lies with its axis 42 essentially in a horizontal plane and is driven by an electric motor 43 0 forming part of the grinding unit 40 .
  • the horizontal grinding spindle 41 carries at its two ends two grinding wheels 43, 44, one of which (44) is designed as a cup grinding wheel.
  • the second grinding unit 40 can be pivoted on the base 25 about a horizontal axis 45 (FIG. 1.3), a pivoting range of plus or minus 10 °, starting from the starting position shown in FIGS. 1.3, generally being sufficient. This pivoting movement can also be carried out under program control by means of a stepping motor indicated at 46 in FIG. 3.
  • the grinding head 21 obviously has three grinding wheels 35, 43, 44, but the arrangement could also be such that a further grinding wheel - at the top in FIG. 1 - is placed on the end of the vertical spindle 37. It would also be conceivable to assign each of the two grinding wheels 41, 44 a separate grinding spindle, which also has its own drive. It is essential that in each case the grinding head 21 has at least three separate grinding wheels and the entire machine tool has six program-controlled movement axes, namely the axes X, Y, Z (FIG. 1) assigned to three translatory movements, the Y axis being the stroke movement the column 20 and thus the grinding head 21 is assigned, and the three axes of rotation A, B, C.
  • the movements along or about the axes X, Y, Z and A, B, C are controlled by a program controller 42 (FIG. 2) which, if necessary, can also control the other movements described via the stepping motors 28, 38, 46 .
  • FIGS. 5 to 8 The operation of the tool grinding machine is exemplified in FIGS. 5 to 8 in connection with the grinding of an end mill with radius:
  • a cylindrical blank 50 is inserted into the tool holding spindle 7 in FIG. 5; the rotary table 3 and the grinding head 21 are pivoted in the manner shown in FIG. 5 by the spiral angle of the tool to be produced from the blank 50 about the axes C and X; The flutes are ground from the solid into the blank 50 by means of the peripheral grinding wheel 43.
  • the blank 50 is accordingly rotated about the axis A, while the rotary table 3 is moved along the X axis, in such a way that the spiral flute is ground in over the necessary length of the blank 30.
  • the grinding head 21 and the rotary table 3 carrying the tool carrier are automatically transferred to the position according to FIG. 6, in which the disk grinding wheel 35 of the grinding unit 32, which is pivoted about the horizontal axis 33, the rake face in the cylindrical cutting part and in Grinding radius area of the tool 50.
  • the rotary table 3 is correspondingly rotated about the axis C, said first cylindrical portion is ground at the rake surface and the pivoting about the C-axis is carried out only at the end of the machining of the cylindrical portion.
  • the horizontal grinding spindle can be inclined about the horizontal axis 45 (FIG. 1) by a value of approximately 10 ° with respect to the horizontal.
  • the machining processes described all take place with a single clamping of the blank or. Tool 50. This not only results in a significant saving in working time, but also a high degree of accuracy, since each reclamping of the tool can lead to errors.
  • the movement processes described take place, controlled by the program control device 47, automatically in accordance with the program previously entered into the program control device 47.
  • the described method of working is only one example of the possible uses of the tool grinding machine, which is suitable for the production and machining of practically all tools, and here in particular also the carbide-tipped or carbide-tipped tools, to which particularly high accuracy requirements are made.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Abstract

To permit cutting of rotatable machine tools, or sharpening of cutting edges therefrom, for example boring tools, drills, milling cutters and the like, a grinding head has positioned thereon two spindles which carry at least three grinding wheels; one of the spindles (41) carries two grinding wheels (43, 44) and is rotatable about a horizontal axis of rotation (42). The other spindle (37) carries a grinding wheel (35) and may carry a second one at the other end (35a) and is positioned for rotation in an essentially vertical plane. The spindles can be tilted out of position in their normal rest planes by program-controlled (47) motors, such as stepping motors or servo motors. The workpiece tool (13, 50) is held in a tool carrier (7) which is rotatable with respect to the grinding head, and movable with respect thereto by cross slide positioning means (4, 5; 2, 19). The machine tool provides six program-controlled movements: three translatory movements along the axes (X, Y, Z), the Y axis being a vertical movement of a post (20) carrying the grinding head; and three axis of tilt or rocking movement (A, B, C) for relative adjustment of the positioning of the grinding heads with respect to the tool.

Description

Die Maschine betrifft eine programmgesteuerte Werkzeugschleifmaschine zum Schleifen von rundlaufenden Werkzeugen, beispielsweise Fräsern und Bohrern, mit einem auf einem Maschinengestell längs einer ersten Vertikalachse (Y) verstellbar und um diese verdrehbar gelagerten Schleifkopf, der eine mit ihrer Achse in einer vertikalen Schwenkebene schwenkbar gelagerte, angetriebene und endseitig eine Schleifscheibe tragende erste Schleifspindel aufweist, sowie mit einem auf dem Maschinengestell im Abstand von dem Schleifkopf auf einem Rundtisch angeordneten Werkzeugträger, der einen um die durch den Rundtisch definierte zweite Vertikalachse (C) schwenkbaren, in einer Horizontalebene verstellbaren Kreuzschlitten aufweist, auf welchem eine mit einer programmgesteuerten Antriebsvorrichtung gekuppelte Werkzeugaufnahmespindel drehbar gelagert ist, wobei der Rundtisch längs einer quer zu dem Schleifkopf verlaufenden ersten Horizontalachse (X) und der Schleifkopf längs einer rechtwinklig zu der ersten Horizontalachse (X) verlaufenden zweiten Hprizontalachse (Z) verstellbar sind und zumindest dem Schleifkopf programmgesteuerte, ihm Stellbewegungen in Form von Längs- und Drehbewegungen bezüglich der einzelnen Achsen erteilende Stellvorrichtungen zugeordnet sind.The machine relates to a program-controlled tool grinding machine for grinding concentric tools, for example milling cutters and drills, with an adjustable on a machine frame along a first vertical axis (Y) and rotatable about this grinding head, which drives a driven with its axis pivotably in a vertical swivel plane and has a first grinding spindle carrying a grinding wheel at the end, and with a tool holder arranged on the machine frame at a distance from the grinding head on a rotary table, which has a cross slide that can be pivoted about the second vertical axis (C) defined by the rotary table and is adjustable in a horizontal plane, on which a tool-holding spindle coupled to a program-controlled drive device is rotatably mounted, the rotary table along a first horizontal axis (X) running transversely to the grinding head and the grinding head along one perpendicular to the first n horizontal horizontal axis (X) extending second horizontal axis (Z) are adjustable and at least the grinding head is program-controlled and assigned to it adjusting movements in the form of longitudinal and rotary movements with respect to the individual axes.

Eine aus der US-PS 3680 263 bekannte Schleifmaschine dieser Art, bei der der Schleifkopf jedoch nicht um eine Vertikalachse drehbar ist, dient zum Schleifen der Stirnzähne eines spiralgenuteten Werkzeuges. Durch entsprechende Drehung des in der Aufnahmespindel gespannten Werkzeuges während des Schleifvorganges können die Schneiden der Stirnzähne, ausgehend von der Werkzeugachse, zum Umfang des Werkzeuges hin geschliffen werden. Diese Maschine gestattet es aber nicht, beispielsweise die am Umfang des Werkzeugkörpers vorhandenen Spiralnuten herzustellen oder zu bearbeiten. Auch könnten bei einem Schaftfräser weder die Spannuten aus dem Vollen in den Rohling eingeschliffen, noch der Freiwinkel an den zylindrischen Schneiden und anschließend im Radiusbereich angeschliffen werden. Um deshalb ein solches Werkzeug fertig zu bearbeiten, müssen mehrere verschiedene Schleifmaschinen aufeinanderfolgend in Einsatz kommen, wozu das Werkzeug jedesmal neu gespannt und ausgerichtet werden muß.A grinding machine of this type known from US Pat. No. 3,680,263, in which, however, the grinding head cannot be rotated about a vertical axis, is used for grinding the front teeth of a spiral-grooved tool. By appropriate rotation of the in the recording spindle-clamped tool during the grinding process, the cutting of the front teeth, starting from the tool axis, can be ground towards the circumference of the tool. However, this machine does not allow, for example, the manufacture or machining of the spiral grooves present on the circumference of the tool body. Also, with an end mill, the flutes could not be ground into the blank from the solid, nor the clearance angle on the cylindrical cutting edges and then ground in the radius area. Therefore, in order to finish machining such a tool, several different grinding machines have to be used in succession, for which the tool has to be re-clamped and aligned each time.

Bei einer anderen, aus der US-PS 4115 956 bekannten programmgesteuerten Schleifmaschine, die insbesondere zum Schleifen der Schneidkanten und der Freiflächen bei Planfräsern und dergl. dient, ist der Schleifkopf noch zusätzlich um eine Vertikalachse schwenkbar, um damit eine größere Vielfältigkeit der Einsatzmöglichkeiten zu erzielen, doch wird dies mit einem mechanisch sehr komplizierten Aufbau der Maschine bezahlt. Da alle Schleifoperationen mit einer einzigen, an dem Schleifkopf vorgesehenen Schleifscheibe durchgeführt werden, ergeben sich verhältnismäßig komplizierte Stellbewegungen für die Schleifspindel-dieser Schleifscheibe, wobei es dennoch nicht ohne weiteres möglich ist, in einer Aufspannung etwa spiralgenutete Schaftfräser an allen Stellen zu schleifen.In another program-controlled grinding machine known from US Pat. No. 4,115,956, which is used in particular for grinding the cutting edges and the free surfaces in face milling cutters and the like, the grinding head can also be pivoted about a vertical axis in order to achieve a greater variety of possible uses , but this is paid for with a mechanically very complicated construction of the machine. Since all grinding operations are carried out with a single grinding wheel provided on the grinding head , this results in relatively complicated adjusting movements for the grinding spindle - this grinding wheel, although it is not easily possible to grind spiral-fluted end mills at all points in one setting.

Außerdem muß die Schleifscheibe eine komplizierte Form haben, weil mit dieser einen Schleifscheibe die verschiedenen Flächen an dem Fräser geschliffen werden müssen. Diese Formschleifscheibe ist sowohl hinsichtlich des Einrichtens relativ zum Fräser als auch in Bezug auf das Verschleißverhalten der Schleifscheibe nicht wirtschaftlich. Handelsübliche genormte Standard-Schleifscheiben können deshalb nicht benutzt werden.In addition, the grinding wheel must have a complicated shape because with this one grinding wheel the ver different surfaces on which milling cutters have to be ground. This shaped grinding wheel is not economical both in terms of setting up relative to the milling cutter and in terms of the wear behavior of the grinding wheel. Commercial standard grinding wheels cannot therefore be used.

Daneben ist in der Praxis eine numerisch gesteuerte Werkzeugschleifmaschine bekannt geworden, deren Schleifkopf zwei einander im festen Abstand und in fester Winkeleinstellung stirnseitig gegenüberliegende Schleifscheiben trägt, die-es gestatten, die Schleifarbeit aufzuteilen. Auch diese Maschine, die insbesondere ebenfalls zum Schleifen von Stirnfräsern bestimmt ist, gestattet es nicht, alle Schleifarbeiten an komplizierteren, am Umfang und stirnseitig sdmeidenden Werkzeugen durchzuführen, es sei denn, sie ist mit 8 Bewegungsachsen ausgebildet, was aber wiederum einen sehr hohen Aufwand bedeutet.In addition, a numerically controlled tool grinding machine has become known in practice, the grinding head of which carries two grinding disks located opposite one another at a fixed distance and at a fixed angle, which allow the grinding work to be divided. This machine, which is also intended for grinding end mills in particular, does not allow all grinding work to be carried out on more complicated tools that are circumferential and end-end-cutting, unless it is designed with 8 axes of movement, which in turn means a very high outlay .

Aufgabe der Erfindung ist es deshalb, eine programmgesteuerte Werkzeugschleifmaschine zu schaffen, die es gestattet, bei vergleichbar geringem technischem Aufwand auch an komplizierteren Werkzeugen, beispielsweise bei einem Radiusfräser, alle.Schleifvorgänge, einschließlich der Spiralnuten an Umfang und Stirn mit einer Werkzeugspannung programmgesteuert selbsttätig durchzuführen.The object of the invention is therefore to provide a program-controlled tool grinding machine which allows all grinding operations, including the spiral grooves on the circumference and forehead, to be carried out automatically under program control with a tool clamping, with comparatively little technical effort, even with more complicated tools, for example with a radius milling cutter.

Zur Lösung dieser Aufgabe ist die eingangs genannte Werkzeugschleifmaschine erfindungsgemüß dadurch gekennzeichnet, daß der Schleifkopf wenigstens drei getrennte Schleifscheiben aufweist, die auf zumindest zwei getrennt angetriebenen Spindeln'sitzen und programmgesteuert nacheinander in der jeweils richtigen räumlichen Ausrichtung mit dem Werkzeug in Eingriff bringbar sind,und daß wenigstens eine der Spindeln mit ihrer Achse im wesentlichen in einer Horizontalebene liegend angeordnet ist.To achieve this object, the tool grinding machine mentioned at the outset is characterized according to the invention in that the grinding head has at least three separate grinding wheels which are seated on at least two separately driven spindles and are program-controlled in succession in the correct one spatial alignment can be brought into engagement with the tool, and that at least one of the spindles is arranged with its axis lying substantially in a horizontal plane.

Dadurch, daß der Schleifkopf zumindest drei Schleifscheiben aufweist, lassen sich selbsttätig alle bei rundlaufenden Werkzeugen vorkommenden Schleifarbeiten durch entsprechende Verstellung der Schleifspindeln des Schleifkopfes und des Werkzeugträgers durchführen, ohne daß die Maschine übermäßig viele Bewegungsachsen aufweisen müßte, die die Steuerung, die Programmierung und auch den mechanischen Aufbau der Maschine wesentlich verteuern. Die neue Werkzeugschleifmaschine benötigt lediglich 6 Bewegungsachsen, von denen 3 jeweils einer Drehbewegung und 3 einer translatorischen Bewegung zugeordnet sind.Due to the fact that the grinding head has at least three grinding wheels, all grinding work occurring with rotating tools can be carried out automatically by adjusting the grinding spindles of the grinding head and the tool holder without the machine having to have an excessive number of axes of motion that control, programming and also the increase the mechanical construction of the machine significantly. The new tool grinding machine only requires 6 axes of movement, 3 of which are each assigned to a rotary movement and 3 to a translatory movement.

Jeder der Schleifscheiben kann eine eigene Schleifspindel zugeordnet sein, doch kann die Anordnung auch derart getroffen sein, daß etwa auf der horizontalen Schleifspindel zwei Schleifscheiben jeweils endseitig angeordnet sind. In ähnlicher Weise können auch auf der in der Vertikalebene schwenkbaren ersten Schleifspindel zwei Schleifscheiben jeweils endseitig vorgesehen sein. Da die erste Schleifspindel mit ihrer Achse, ausgehend von einer Vertikalstellung, verschwankbar ist und wenigstens eine weitere Schleifspindel mit ihrer Achse im wesentlichen horizontal angeordnet ist, so daß diese beiden Schleifspindeln sich im Raume in der Ausgangsstellung rechtwinklig kreuzen, ergeben sich verhältnismäßig kleine Verstellwege aus den genannten Ausgangsstellungen, um die Schleifscheiben für den jeweiligen Schleifvorgang in die richtige räumliche Lage zu überführen.Each of the grinding wheels can be assigned its own grinding spindle, but the arrangement can also be such that, for example, two grinding wheels are arranged at each end on the horizontal grinding spindle. Similarly, two grinding wheels can also be provided at each end on the first grinding spindle, which is pivotable in the vertical plane. Since the first grinding spindle with its axis, starting from a vertical position, can be fluctuated and at least one further grinding spindle with its axis is arranged essentially horizontally, so that these two grinding spindles intersect at right angles in space in the starting position, relatively small adjustment paths result from the mentioned starting positions in order to transfer the grinding wheels into the correct spatial position for the respective grinding process.

Es können auch handelsübliche genormte Schleifscheiben zum Einsatz kommen; dadurch wird die Wirtschaftlichkeit der Maschine wesentlich erhöht.Commercially available standardized grinding wheels can also be used; this significantly increases the economic efficiency of the machine.

Dabei ist es zweckmäßig, wenn die die erste Schleifspindelachse enthaltende Vertikalebene-und die andere horizontale Schleifspindel auf verschiedenen Seiten der ersten Vertikalachse liegen, um die der Schleifkopf verdrehbar ist. Damit lassen sich nämlich verhältnismäßig kleine Stellbewegungen sowohl des Werkzeugträgers als auch des Schleifkopfes beim Übergang zwischen den einzelnen Bearbeitungsvorgängen des Werkzeuges erzielen. Dadurch sind die unproduktiven Nebenzeiten ebenfalls sehr kurz, was zusätzlich die Wirtschaftlichkeit der Maschine erhöht.It is expedient if the vertical plane containing the first grinding spindle axis and the other horizontal grinding spindle lie on different sides of the first vertical axis about which the grinding head can be rotated. This makes it possible to achieve relatively small adjusting movements of both the tool carrier and the grinding head during the transition between the individual machining operations of the tool. As a result, the unproductive idle times are also very short, which also increases the machine's economy.

Vorteilhaft ist es auch, wenn die horizontale Schleifspindel um eine quer verlaufende Horizontalachse schwenkbar gelagert ist, so daß beispielsweise zum Anschleifen des Freiwinkels an den zylindrischen Schneiden eines Radiusfräsers die auf dieser Schleifspindel sitzende Topf-Schleifscheibe um einen bestimmten kleinen Winkel in der Größenordnung von 10° schräg gestellt werden kann. Auch kann die Anordnung derart getroffen sein, daß die erste Schleifspindel mit ihrer Schwenkebene um eine im Abstand zu ihr verlaufende Horizontalachse kippbar gelagert ist, womit die Vielfältigkeit der Einstellmöglichkeiten erhöht wird.It is also advantageous if the horizontal grinding spindle is pivotally mounted about a transverse horizontal axis, so that, for example, to grind the clearance angle on the cylindrical cutting edges of a radius cutter, the cup grinding wheel seated on this grinding spindle by a certain small angle in the order of 10 ° can be tilted. The arrangement can also be such that the first grinding spindle with its pivot plane is mounted such that it can be tilted about a horizontal axis running at a distance from it, which increases the variety of setting options.

Die erste Schleifspindel und/oder die horizontale Schleifspindel sind zweckmäßigerweisc mit ihrem Antriebsmotor jeweils zu einer gemeinsam verstellbaren Einheit verbunden, während der Schleifkopf selbst um wenigstens 180° um die erste Vertikalachse verschwenkbar ausgebildet ist.The first grinding spindle and / or the horizontal grinding spindle are expediently connected to their drive motor to form a jointly adjustable unit, while the grinding head itself is designed to be pivotable by at least 180 ° about the first vertical axis.

In der Zeichnung ist ein Ausführungsbeispiel des Gegenstandes der Erfindung dargestellt. Es zeigen

  • Figur 1 eine Werkzeugschleifmaschine gemäß der Erfindung in perspektivischer, schematischer Teildarstellung, Figur 2 die Werkzeugschleifmaschine nach Figur 1, in einer Seitenansicht, in der Richtung der
  • Pfeile II-II der Figur 1, bei in der Ruhelage stehendem Werkzeugträger, Figur 3 die Werkzeugschleifmaschine nach Figur 1, in einer Seitenansicht, in Richtung der Pfeile III-III der Figur 1, bei seitwärts geschwenktem Werkzeugträger, Figur 4 die Werkzeugschleifmaschine nach Figur 2, in der Draufsicht, Figur 5 den Schleifkopf und den Werkzeugträger der Werkzeugschleif- , maschine nach Figur 1, in der Draufsicht, unter Veranschaulichung der gegenseitigen räumlichen Zuordnung beim Schleifen der Spiralnuten eines in der Werkzeugspindel aufgenommenen spiralgenuteten Werkzeuges, Figur 6 die Anordnung nach Figur 5, in einer Seitenansicht, unter Veranschaulichung der gegenseitigen Zuordnung beim Schleifen der Spanflächen des Werkzeugs, Figur 7 die Anordnung nach Figur 5, in der Draufsicht, unter Veranschaulichung der gegenseitigen Zuordnung beim Anschleifen der Freiflächen, und Figur 8 die Anordnung nach Figur 5, in der Draufsicht, unter Veranschaulichung der gegenseitigen Zuordnung beim Schleifen des Freiwinkels im Radiusbereich des Werkzeuges.
In the drawing, an embodiment of the object of the invention is shown. Show it
  • 1 shows a tool grinding machine according to the invention in a perspective, schematic partial illustration, FIG. 2 shows the tool grinding machine according to FIG. 1, in a side view, in the direction of FIG
  • Arrows II-II of Figure 1, with the tool holder in the rest position, Figure 3 the tool grinding machine according to Figure 1, in a side view, in the direction of arrows III-III of Figure 1, with the tool holder pivoted sideways, Figure 4, the tool grinding machine according to Figure 2 5, the grinding head and the tool carrier of the tool grinding machine according to FIG. 1, in the top view, illustrating the mutual spatial assignment when grinding the spiral grooves of a spiral-grooved tool accommodated in the tool spindle, FIG. 6 the arrangement according to FIG. 5 , in a side view, illustrating the mutual assignment when grinding the rake surfaces of the tool, FIG. 7 shows the arrangement according to FIG. 5, in a top view, illustrating the mutual assignment when grinding the open surfaces, and FIG. 8 shows the arrangement according to FIG. 5, in which Top view, showing the mutual assignment in the loop the clearance angle in the radius area of the tool.

Die in den Figuren 1 bis 4 dargestellte programmgesteuerte Werkzeugschleifmaschine weist ein Maschinengestell 1 auf, auf dem ein erster Schlitten 2 längs einer ersten Horizontalachse X verschieblich gelagert ist. Der erste Schlitten 2 trägt einen Rundtisch 3 mit vertikaler Drehachse C, auf dem ein aus einem Längs- und Quersupport 4 bzw. 5 bestehender Kreuzschlitten endseitig befestigt ist.The program-controlled tool grinding machine shown in FIGS. 1 to 4 has a machine frame 1 on which a first slide 2 is displaceably mounted along a first horizontal axis X. The first slide 2 carries a rotary table 3 with a vertical axis of rotation C, on which a cross slide consisting of a longitudinal and transverse support 4 or 5 is fastened at the end.

Der Quersupport 5 trägt seinerseits ein Spindelgehäuse 6, das parallel zu dem Längssupport 4 ausgerichtet und in dem eine Werkzeugaufnahmespindel 7 drehbar gelagert ist. Das Spindelgehäuse 6 ist zwischen zwei Backen 8 gehaltert und mittels Stellschrauben 9 fixiert. Nach dem Lösen der Stellschrauben 9 kann es um eine Horizontalachse 10 verschwenkt werden, so daß die Achse der Werkzeugaufnahmespindel 7 eine entsprechende Neigung gegenüber der Horizontalen erhält.The cross support 5 in turn carries a spindle housing 6 which is aligned parallel to the longitudinal support 4 and in which a tool holder spindle 7 is rotatably mounted. The spindle housing 6 is held between two jaws 8 and fixed by means of set screws 9. After loosening the set screws 9, it can be pivoted about a horizontal axis 10, so that the axis of the tool holding spindle 7 receives a corresponding inclination with respect to the horizontal.

An das Spindelgehäuse 6 ist ein Untersetzungsgetriebe 11 angeflanscht, auf das ein Schrittschaltmotor 12 aufgesetzt ist, der über das Untersetzungsgetriebe 11 die Werkzeugaufnahmespindel 7 um ihre Drehachse A antreiben kann, wie dies durch einen Pfeil 13 angedeutet ist (Fig. 1).A reduction gear 11 is flanged to the spindle housing 6, onto which a stepping motor 12 is placed, which can drive the tool holding spindle 7 about its axis of rotation A via the reduction gear 11, as indicated by an arrow 13 (FIG. 1).

In ähnlicher Weise ist dem Rundtisch 3 über ein Untersetzungsgetriebe 14 (Fig. 2) ein zweiter Schrittschaltmotor 15 zugeordnet, der es gestattet, programmgesteuert den Rundtisch 3 und damit den darauf sitzenden Kreuzschlitten um die Vertikalachse C zu verdrehen, was in Fig. 1 durch einen Pfeil 16 angedeutet ist.Similarly, the R is assigned undtisch 3 via a reduction gear 14 (Fig. 2), a second stepping motor 15 which allows to programmatically the rotary table 3 and hence the seated thereon cross slide about the vertical axis C to rotate, as indicated by in Fig. 1 an arrow 16 is indicated.

Auch der den Rundtisch 3 tragende Schlitten 2 ist über ein entsprechendes, nicht weiter dargestelltes Untersetzungsgetriebe mit einem programmgesteuerten Schrittschaltmotor 16 (Fig. 2) gekuppelt, der es gestattet, den Rundtisch 3 und den darauf angeordneten, im Vorstehenden beschriebenen, aus dem Kreuzschlitten dem Spindelgehäuse 6 der Werkzeugaufnahme 7 und dem Schrittschaltmotor 12 mit dem zugeordneten Untersetzungsgetriebe 11 bestehenden Werkzeugträger längs der ersten Horizontalachse X programmgemäß zu verschieben.The carriage 2 carrying the rotary table 3 is also coupled via a corresponding reduction gear (not shown further) to a program-controlled stepping motor 16 (FIG. 2), which allows to move the rotary table 3 and the tool carrier arranged thereon, described above and consisting of the cross slide, the spindle housing 6 of the tool holder 7 and the stepping motor 12 with the associated reduction gear 11, along the first horizontal axis X in accordance with the program.

Der Längssupport 4 des Kreuzschlittens kann von Hand durch Betätigung eines Handrads 17 (Fig. 2) verstellt werden, während die Verstellung des Quersupports 5 durch ein entsprechendes Handrad 18 (Fig. 4) ebenfalls von Hand geschehen kann. Allerdings ist auch vorgesehen, diese beiden Bewegungen durch einen geeigneten programmgesteuerten Antrieb durchzuführen, womit die Umrüstzeiten weiter reduziert werden.können.The longitudinal support 4 of the cross slide can be adjusted by hand by actuating a handwheel 17 (FIG. 2), while the adjustment of the transverse support 5 by a corresponding handwheel 18 (FIG. 4) can also be done by hand. However, it is also planned to carry out these two movements by means of a suitable program-controlled drive, which can further reduce the changeover times.

Auf dem Maschinengestell 2 ist ein zweiter Schlitten 19 längs einer zweiten Horizontalachse Z längsverschieblich gelagert, die rechtwinklig zu der ersten Horizontalachse X verläuft, längs derer der Rundtisch verschieblich ist. Auf dem zweiten Schlitten 19 ist eine Säule 20 höhenverstellbar gelagert, auf der ein Schleifkopf 21 angeordnet ist. Der zweite Schlitten 19 ist über ein Untersetzungsgetriebe 22 ebenfalls von einem Schrittschaltmotor 23 (Fig. 2) programmgesteuert längs der zweiten Horizontalachse Z verschiebbar.On the machine frame 2, a second carriage 19 is mounted so as to be longitudinally displaceable along a second horizontal axis Z, which runs at right angles to the first horizontal axis X, along which the rotary table is displaceable. A height-adjustable column 20 on which a grinding head 21 is arranged is mounted on the second carriage 19. The second carriage 19 can also be shifted along the second horizontal axis Z in a program-controlled manner by a stepping motor 23 (FIG. 2) via a reduction gear 22.

Auf der höhenverstellbaren Säule 20, deren Höhenverstellung längs einer Y-Achse über einen (Fig. 3) programmgesteuerten Schrittschaltmotor 27a erfolgt, der an einem Untersetzungsgetriebe 26 angeflanscht ist, ist der eigentliche Schleifkopf 21 aufgebaut und drehbar gelagert. Der Sockel 25 ist über ein in dem Gehäuse des Untersetzungsgetriebes 26 enthaltenes zweites UntersetzungsgetrieLe von einem ebenfalls angeflanschten Schrittschaltmotor 27 um eine Vertikalachse B (Fig. 1, 2), ausgehend von einer in Fig.1 veranschaulichten Ausgangsstellung, in beiden Richtungen um wenigstens 180° verdrehbar. Auf ihm ist mittels Lagerteilen 28 eine Halterungsplatte 29 befestigt, welche eine in einer Horizontalebene liegende Aufspannfläche trägt, an der über einen Rundteller 31 eine erste Schleifeinheit 32 um eine Horizontalachse 33 schwenkbar gelagert ist. Die erste Schleifeinheit 32 weist eine mit ihrer Achse 34 in einer Vertikalebene um die Achse 33 schwenkbare erste Schleifspindel auf, die endseitig eine Schleifscheibe 35 trägt und durch einen einen Teil der Schleifeinheit 32 bildenden, mit ihr fest gekuppelten Elektromotor 36 angetrieben ist. Ausgehend von der in Fig. 1 dargestellten Ausgangsstellung kann die erste Schleifspindel 37 um die Horizontalachse 33 beispielsweise um den Spiralwinkel eines zu schleifenden Werkzeuges geschwenkt werden; beispielsweise bis zu plus oder minus 50°. Außerdem kann aber die ganze Schleifeinheit 32 erforderlichenfalls gemeinsam mit der erwähnten SchwenKebene der Achse 34 der Schleifspindel 37 um die andere Horizontalachse 30 geschwenkt werden. Beide Schwenkbewegungen können von Hand vorgenommen werden; normalerweise sind den beiden Schwenkachsen 33,30 aber mit entsprechenden Untersetzungsgetrieben ausgestattete Schrittschaltmotoren zugeordnet, wie sie bei 38 und 39 in Fig. 1 angedeutet sind.The actual grinding head 21 is mounted and rotatably mounted on the height-adjustable column 20, the height of which is adjusted along a Y-axis via a (FIG. 3) program-controlled stepping motor 27a which is flanged to a reduction gear 26. The base 25 is via a second reduction gear contained in the housing of the reduction gear 26 by a stepping motor 27 which is also flanged on Vertical axis B (Fig. 1, 2), starting from an initial position illustrated in Fig.1, rotatable in both directions by at least 18 0 °. A mounting plate 29 is fastened on it by means of bearing parts 28, which carries a clamping surface lying in a horizontal plane, on which a first grinding unit 32 is pivotally mounted about a horizontal axis 33 via a rotary plate 31. The first grinding unit 32 has a first grinding spindle which can be pivoted with its axis 34 in a vertical plane about the axis 33, which carries a grinding wheel 35 at the end and is driven by an electric motor 36 which forms part of the grinding unit 32 and is firmly coupled to it. Starting from the starting position shown in FIG. 1, the first grinding spindle 37 can be pivoted about the horizontal axis 33, for example about the spiral angle of a tool to be ground; for example up to plus or minus 50 °. In addition, however, the entire grinding unit 32 can, if necessary, be pivoted together with the mentioned pivoting plane of the axis 34 of the grinding spindle 37 about the other horizontal axis 30. Both swiveling movements can be carried out by hand; Normally, the two pivot axes 33, 30 are assigned stepping motors equipped with corresponding reduction gears, as indicated at 38 and 39 in FIG. 1.

Auf der der ersten Schleifeinheit 32 gegenüberliegenden Seite der Vertikalachse B ist eine zweite Schleifeinheit 40 angeordnet, die eine zweite Schleifspindel 41 aufweist, welche mit ihrer Achse 42 im wesentlichen in einer Horizontalebene liegt und über einen einen Teil der Schleifeinheit 40 bildenden Elektromotor 430 angetrieben ist. Die horizontale Schleifspindel 41 trägt an ihren beiden Enden zwei Schleifscheiben 43,44, von denen die eine (44) als Topf-Schleifscheibe ausgebildet ist. Die zweite Schleifeinheit 40 ist an dem Sockel 25 um eine Horizontalachse 45 (Fig. 1,3) verschwenkbar, wobei in der Regel ein Schwenkbereich von plus oder minus 10°, ausgehend von der in den Fig.1,3 dargestellten Ausgangsstellung, genügt. Auch diese Schwenkbewegung kann programmgesteuert durch einen bei 46 in Fig. 3 angedeuteten Schrittschaltmotor erfolgen.Arranged on the side of the vertical axis B opposite the first grinding unit 32 is a second grinding unit 40 which has a second grinding spindle 41 which lies with its axis 42 essentially in a horizontal plane and is driven by an electric motor 43 0 forming part of the grinding unit 40 . The horizontal grinding spindle 41 carries at its two ends two grinding wheels 43, 44, one of which (44) is designed as a cup grinding wheel. The second grinding unit 40 can be pivoted on the base 25 about a horizontal axis 45 (FIG. 1.3), a pivoting range of plus or minus 10 °, starting from the starting position shown in FIGS. 1.3, generally being sufficient. This pivoting movement can also be carried out under program control by means of a stepping motor indicated at 46 in FIG. 3.

Der Schleifkopf 21 trägt ersichtlich drei Schleifscheiben 35, 43, 44, doch könnte die Anordnung auch derart getroffen sein, daß auf die Vertikalspindel 37 noch eine weitere Schleifscheibe - in Fig. 1 oben - endseitig aufgesetzt ist. Auch wäre es denkbar, den beiden Schleifscheiben 41,44 jeweils eine eigene Schleifspindel zuzuordnen, die auch über einen eigenen Antrieb verfügt. Wesentlich ist, daß in jedem Falle der Schleifkopf 21 zumindest drei getrennte Schleifscheiben aufweist und die ganze Werkzeugmaschine über sechs programmgesteuerte Bewegungsachsen verfügt, nämlich die drei translatorischen Bewegungen zugeordneten Achsen X,Y,Z (Fig. 1), wobei die Y-Achse der Hubbewegung der Säule 20 und damit des Schleifkopfes 21 zugeordnet ist, und die drei Rotationsachsen A,B,C.The grinding head 21 obviously has three grinding wheels 35, 43, 44, but the arrangement could also be such that a further grinding wheel - at the top in FIG. 1 - is placed on the end of the vertical spindle 37. It would also be conceivable to assign each of the two grinding wheels 41, 44 a separate grinding spindle, which also has its own drive. It is essential that in each case the grinding head 21 has at least three separate grinding wheels and the entire machine tool has six program-controlled movement axes, namely the axes X, Y, Z (FIG. 1) assigned to three translatory movements, the Y axis being the stroke movement the column 20 and thus the grinding head 21 is assigned, and the three axes of rotation A, B, C.

Die Bewegungen längs bzw. um die Achsen X,Y,Z und A,B,C sind durch einen Programmregler 42 gesteuert (Fig.2), der gegebenenfalls auch eine Steuerung der übrigen erläuterten Bewegungen über die Schrittschaltmotoren 28,38,46 vornehmen kann.The movements along or about the axes X, Y, Z and A, B, C are controlled by a program controller 42 (FIG. 2) which, if necessary, can also control the other movements described via the stepping motors 28, 38, 46 .

Die Arbeitsweise der Werkzeugschleifmaschine ist beispielhaft in den Fig. 5 bis 8 im Zusammenhang mit dem Schleifen eines Schaftfräsers mit Radius veranschaulicht:The operation of the tool grinding machine is exemplified in FIGS. 5 to 8 in connection with the grinding of an end mill with radius:

In die Werkzeugaufnahmespindel 7 ist in Fig. 5 ein zylindrischer Rohling 50 eingesetzt; der Rundtisch 3 und der Schleifkopf 21 sind in der in Fig. 5 ersichtlichen Weise um den Spiralwinkel des aus dem Rohling 50 herzustellenden Werkzeuges um die Achsen C und X gegeneinander verschwenkt; mittels der Umfangs-Schleifscheibe 43 werden die Spannuten aus dem Vollen in den Rohling 50 eingeschliffen. Dabei wird der Rohling 50 um die Achse A entsprechend gedreht, während der Rundtisch 3 längs der X-Achse bewegt wird, derart, daß die spiralige Spannut über die notwendige Länge des Rohlings 30 eingeschliffen wird.A cylindrical blank 50 is inserted into the tool holding spindle 7 in FIG. 5; the rotary table 3 and the grinding head 21 are pivoted in the manner shown in FIG. 5 by the spiral angle of the tool to be produced from the blank 50 about the axes C and X; The flutes are ground from the solid into the blank 50 by means of the peripheral grinding wheel 43. The blank 50 is accordingly rotated about the axis A, while the rotary table 3 is moved along the X axis, in such a way that the spiral flute is ground in over the necessary length of the blank 30.

Sowie die Spannuten eingeschliffen sind, werden der Schleifkopf 21 und der den Werkzeugträger tragende Rundtisch 3 selbsttätig in die Stellung nach Fig. 6 überführt, in der die Teller-Schleifscheibe 35 der um die Horizontalachse 33 entsprechend verschwenkten Schleifeinheit 32 die Spanfläche im zylindrischen Schneidenteil und im Radiusbereich des Werkzeuges 50 anschleift. Zum Anschleifen der Spanfläche im Radiusbereich wird der Rundtisch 3 um die Achse C entsprechend verdreht, wobei zunächst der zylindrische Teil an der Spanfläche geschliffen wird und erst am Ende der Bearbeitung des zylindrischen Teils die Verschwenkung um die C-Achse erfolgt.As soon as the flutes are ground in, the grinding head 21 and the rotary table 3 carrying the tool carrier are automatically transferred to the position according to FIG. 6, in which the disk grinding wheel 35 of the grinding unit 32, which is pivoted about the horizontal axis 33, the rake face in the cylindrical cutting part and in Grinding radius area of the tool 50. For grinding the rake face in the R adiusbereich the rotary table 3 is correspondingly rotated about the axis C, said first cylindrical portion is ground at the rake surface and the pivoting about the C-axis is carried out only at the end of the machining of the cylindrical portion.

Daran anschließend werden programmgesteuert der Schleifkopf 21 und der Rundtisch 3 in die Stellung nach Fig. 7 überführt, in der mittels der Topf-Schleifscheibe 44 der Freiwinkel an den zylindrischen Schneiden angeschliffen wird. Dabei kann die horizontale Schleifspindel um die Horizontalachse 45 (Fig. 1) um einen Wert von ca. 10° gegenüber der Horizontalen geneigt sein.Then the grinding head 21 and the rotary table 3 are transferred to the position according to FIG. 7 in a program-controlled manner, in which the clearance angle on the cylindrical cutting edges is ground by means of the cup grinding wheel 44. The horizontal grinding spindle can be inclined about the horizontal axis 45 (FIG. 1) by a value of approximately 10 ° with respect to the horizontal.

Schließlich wird in der aus Fig. 8 ersichtlichen Weise der Freiwinkel im Radiusbereich des Werkzeuges 50 angeschliffen, wobei sich der Rundtisch 3 um die Achse C hin- und herbewegt.Finally, in the manner shown in FIG. 8, the clearance angle is ground in the radius area of the tool 50, the rotary table 3 moving back and forth about the axis C.

Ersichtlich erfolgen die geschilderten Bearbeitungsvorgänge alle bei einer einzigen Einspannung des Rohlinges-bzw. Werkzeuges 50. Damit ergibt sich nicht nur eine wesentliche Einsparung an Arbeitszeit, sondern auch ein hohes Maß an Genauigkeit, da jedes Umspannen des Werkzeuges Fehler mit sich bringen kann. Die geschilderten Bewegungsvorgänge erfolgen,gesteuert von dem Programmsteuerungsgerät 47, selbsttätig gemäß dem vorher in das Programmsteuergerät 47 eingegebenen Progranun.As can be seen, the machining processes described all take place with a single clamping of the blank or. Tool 50. This not only results in a significant saving in working time, but also a high degree of accuracy, since each reclamping of the tool can lead to errors. The movement processes described take place, controlled by the program control device 47, automatically in accordance with the program previously entered into the program control device 47.

Selbstverständlich ist die geschilderte Arbeitsweise nur ein Beispiel für die Einsatzmöglichkeiten der Werkzeugschleifmaschine, die zur Herstellung und Bearbeitung praktisch aller vorkommender Werkzeuge, und hier insbesondere auch der hartmetallbestückten oder aus Hartmetall bestehenden Werkzeuge geeignet ist, an die besonders hohe Genauigkeitsanforderungen gestellt werden.Of course, the described method of working is only one example of the possible uses of the tool grinding machine, which is suitable for the production and machining of practically all tools, and here in particular also the carbide-tipped or carbide-tipped tools, to which particularly high accuracy requirements are made.

Anstelle der bei dem beschriebenen Ausführungsbeispiel erläuterten Schrittschaltmotoren können auch andere Antriebe, beispielsweise Gleichstromservoantriebe und/oder elektrohydraulische Servoantriebe, verwendet werden.Instead of the stepping motors explained in the exemplary embodiment described, other drives, for example direct current servo drives and / or electrohydraulic servo drives, can also be used.

Claims (10)

1. Programmgesteuerte Werkzeugschleifmaschine zum Schleifen von rundlaufenden Werkzeugen, beispielsweise Fräsern und Bohrern, mit einem auf einem Maschinengestell längs einer ersten Vertikalachse (Y) verstellbar und um diese verdrehbar gelagerten Schleifkopf, der eine mit ihrer Achse in einer vertikalen Schwenkebene schwenkbar gelagerte, angetriebene und endseitig eine Schleifscheibe tragende erste Schleifspindel aufweist, sowie mit einem auf dem Maschinengestell im Abstand von dem Schleifkopf auf einem Rundtisch angeordneten Werkzeugträger, der einen um die durch den Rundtisch definierte zweite Vertikalachse (C) schwenkbaren, in einer Horizontalebene verstellbaren Kreuzschlitten aufweist, auf welchem eine mit einer programmgesteuerten Antriebsvorrichtung gekuppelte Werkzeugaufnahmespindel drehbar gelagert ist, wobei der Rundtisch längs einer quer zu dem Schleifkopf verlaufenden ersten Horizontalachse (X) und der Schleifkopf längs einer rechtwinklig zu der ersten Horizontalachse verlaufenden zweiten Horizontalachse (Z) verstellbar sind und zumindest dem Schleifkopf programmgesteuerte, ihm Stellbewegungen in Form von Längs- und Drehbewegungen bezüglich der einzelnen Achsen erteilende Stellvorrichtungen zugeordnet sind, dadurch gekennzeichnet, daß der Schleifkopf (21) wenigstens drei getrennte Schleifscheiben (35, 43, 44) aufweist, die auf zumindest zwei getrennt angetriebenen Schleifspindeln (37,41) sitzen und programmgesteuert nacheinander mit der jeweils richtigen räumlichen Ausrichtung mit dem Werkstück (50) in Eingriff bringbar sind, und daß wenigstens eine (41) der Schleifspindeln mit ihrer Achse (42) im wesentlichen in einer Horizontalebene liegend angeordnet ist.1.Program-controlled tool grinding machine for grinding concentric tools, for example milling cutters and drills, with an adjustable on a machine frame along a first vertical axis (Y) and rotatably mounted grinding head, which is a driven and end-mounted with its axis in a vertical swivel plane has a grinding wheel carrying a first grinding spindle, and with a tool carrier arranged on the machine frame at a distance from the grinding head on a rotary table, which has a cross slide which can be pivoted about the second vertical axis (C) defined by the rotary table and is adjustable in a horizontal plane, on which a cross slide is provided a tool-controlled spindle coupled to a program-controlled drive device is rotatably mounted, the rotary table being along a first horizontal axis (X) running transversely to the grinding head and the grinding head being along a perpendicular to the first horizontal axis fenden second horizontal axis (Z) are adjustable and at least the grinding head program-controlled adjusting devices in the form of longitudinal and rotary movements with respect to the individual axes giving it adjusting devices, characterized in that the grinding head (21) has at least three separate grinding wheels (35, 43, 44), which are seated on at least two separately driven grinding spindles (37, 41) and can be brought into engagement with the workpiece (50) one after the other with the correct spatial orientation in program-controlled fashion, and that at least one (41) of the grinding spindles with its axis ( 42) is arranged lying essentially in a horizontal plane. 2. Werkzeugschleifmaschine nach Anspruch 1, dadurch gekennzeichnet, daß jeder der Schleifscheiben (35, 44,43) eine eigene Schleifspindel zugeordnet ist.2. Tool grinding machine according to claim 1, characterized in that each of the grinding wheels (35, 44, 43) is assigned its own grinding spindle. 3. Werkzeugschleifmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die die erste Schleifspindelachse (34) enthaltende Vertikalebene und die andere horizontale Schleifspindel (41) auf verschiedenen Seiten der ersten Vertikalachse(y) liegen.3. Tool grinding machine according to one of the preceding claims, characterized in that the vertical plane containing the first grinding spindle axis (34) and the other horizontal grinding spindle (41) lie on different sides of the first vertical axis (y). 4. Werkzeugschleifmaschine nach Anspruch 1, dadurch gekennzeichnet, daß auf der horizontalen Schleifspindel (41) zwei Schleifscheiben (43,44) jeweils endseitig angeordnet sind.4. Tool grinding machine according to claim 1, characterized in that on the horizontal grinding spindle (41) two grinding wheels (43,44) are each arranged at the ends. 5. Werkzeugschleifmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die horizontale Schleifspindel (41) um eine quer verlaufende Horizontalachse (45) schwenkbar gelagert ist.5. Tool grinding machine according to one of the preceding claims, characterized in that the horizontal grinding spindle (41) is pivotally mounted about a transverse horizontal axis (45). 6. Werkzeugschleifmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die erste Schleifspindel (37) mit ihrer Schwenkebene um eine im Abstand zu ihr verlaufende Horizontalachse (30) kippbar gelagert ist.6. Tool grinding machine according to one of the preceding claims, characterized in that the first grinding spindle (37) with its pivoting plane is mounted so as to be tiltable about a horizontal axis (30) running at a distance from it. 7. Werkzeugschleifmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß auf der ersten Schleifspindel (37) zwei Schleifscheiben (35) jeweils endseitig angeordnet sind.7. Tool grinding machine according to one of the preceding claims, characterized in that on the first grinding spindle (37) two grinding wheels (35) are each arranged at the ends. 8. Werkzeugschleifmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die erste Schleifspindel (37) und/oder die horizontale Schleifspindel (41) jeweils mit ihrem Antriebsmotor (36 bzw. 43) zu einer gemeinsam verstellbaren Einheit (32,40) verbunden sind.8. Tool grinding machine according to one of the preceding claims, characterized in that the first grinding spindle (37) and / or the horizontal grinding spindle (41) with their drive motor (36 or 43) are connected to a jointly adjustable unit (32, 40). 9. Werkzeugschleifmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Schleifkopf (21) um wenigstens 180° um die erste Vertikalachse (Y) verschwenkbar ausgebildet ist.9. Tool grinding machine according to one of the preceding claims, characterized in that the grinding head (21) is designed to be pivotable by at least 180 ° about the first vertical axis (Y). 10. Werkzeugschleifmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß alle Schleifscheiben (35, 44, 43) handelsübliche genormte Standard-Schleifscheiben sind.10. Tool grinding machine according to one of the preceding claims, characterized in that all grinding wheels (35, 44, 43) are commercially available standardized standard grinding wheels.
EP82100857A 1981-08-25 1982-02-06 Programme-controlled tool guiding machine Expired EP0072887B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82100857T ATE11500T1 (en) 1981-08-25 1982-02-06 PROGRAM CONTROLLED TOOL GRINDING MACHINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3133488 1981-08-25
DE3133488A DE3133488C3 (en) 1981-08-25 1981-08-25 Program-controlled tool grinding machine

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EP0072887A1 true EP0072887A1 (en) 1983-03-02
EP0072887B1 EP0072887B1 (en) 1985-01-30

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EP82100857A Expired EP0072887B1 (en) 1981-08-25 1982-02-06 Programme-controlled tool guiding machine

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US (1) US4461121A (en)
EP (1) EP0072887B1 (en)
JP (1) JPH0622786B2 (en)
AT (1) ATE11500T1 (en)
DE (1) DE3133488C3 (en)

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EP0426146A3 (en) * 1989-11-03 1991-10-16 Volker Zang Device to be mounted on a tool grinding machine
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CN106863088B (en) * 2017-02-13 2019-09-17 戴恩（天津）科技有限公司 A kind of semiautomatic precision numerically control grinder
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Also Published As

Publication number Publication date
JPS5840255A (en) 1983-03-09
DE3133488C2 (en) 1994-07-28
ATE11500T1 (en) 1985-02-15
DE3133488A1 (en) 1983-03-17
DE3133488C3 (en) 1994-07-28
JPH0622786B2 (en) 1994-03-30
EP0072887B1 (en) 1985-01-30
US4461121A (en) 1984-07-24

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