EP0625407B1 - Grinding machine - Google Patents
Grinding machine Download PDFInfo
- Publication number
- EP0625407B1 EP0625407B1 EP94107666A EP94107666A EP0625407B1 EP 0625407 B1 EP0625407 B1 EP 0625407B1 EP 94107666 A EP94107666 A EP 94107666A EP 94107666 A EP94107666 A EP 94107666A EP 0625407 B1 EP0625407 B1 EP 0625407B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- grinding
- workpiece
- machine according
- grinding machine
- grinding head
- 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.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
- B24B21/16—Machines or devices using grinding or polishing belts; Accessories therefor for grinding other surfaces of particular shape
-
- 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
- B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
- B24B21/04—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces
-
- 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
- B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
- B24B21/04—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces
- B24B21/06—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces involving members with limited contact area pressing the belt against the work, e.g. shoes sweeping across the whole area to be ground
Definitions
- the invention relates to a grinding machine with at least a grinding head with a sanding belt, which is by means of a Pressure bar on a workpiece moved relative to the grinding head is pressed, the grinding head over the surface of the workpiece is designed to be movable.
- Such grinding machines are in numerous embodiments known. With these belt grinding machines, the workpiece placed on a conveyor belt and under the driven and abrasive belt pressed against the surface of the workpiece promoted through. To achieve an improved grinding result to achieve multiple grinding directions, it is known to Perform cross sanding by the surface of the workpiece ground in two mutually perpendicular directions becomes. Grinding machines that have such a cross grinding in in one pass are necessarily large plants, that require a significant investment.
- a grinding machine which is specially designed for sanding wooden frames.
- Wooden frame is positioned on a conveyor belt on which it is movable in the conveying direction.
- the grinding head is mounted so that it can move across the conveying direction.
- For Grinding the frame becomes the grinding head at an exit corner positioned and towards the respective rectilinear Frame section moves, either through the Movement of the grinding head on the portal or by an appropriate one Advance of the workpiece.
- the grinding head is formed by an all-round sanding belt with a pressure shoe, and becomes perpendicular to that for grinding one previously ground frame part standing frame part by 90 ° turned. The execution of several grinding directions on one Frame part itself is not provided.
- the problem in the prior art is that either a considerable mechanical or a considerable operating effort is required to get a high quality surface finish to achieve.
- the problem underlying the invention consists of specifying a grinding machine which enables improvements to be made to the problem described.
- one is to solve the problem posed Grinding machine of the type mentioned in the introduction, that at least one sensor one in the travel of Abrasive head lying edge of the workpiece detects that a controller determines the travel distance according to the detected one Limited edge and reversed the movement of the grinding head, that the pressure beam from a variety of pressure shoe members exists, which are individually switchable into an active position and that the circuit of the pressure shoe members in the operative position can be controlled by the at least one sensor.
- a moving grinding head over the surface of the Workpiece is movable so that the workpiece even when stationary can stay.
- the movement of the grinding head over the The surface of the workpiece is automatically controlled.
- the grinding head is moved from a starting position in one Move the first travel path over the surface of the workpiece.
- a sensor of the grinding head detects an edge of the Workpiece that lies in the travel of the grinding head and causes a reversal of the movement of the Grinding head, whereupon this preferably automatically another path is guided over the workpiece.
- the Control is set so that the entire surface of the workpiece is grasped by the grinding head, ie ground becomes.
- the pressure beam of the grinding machine according to the invention consists in itself, for example, of EP 0 155 380 B1 known manner from a large number of pressure shoe members, which can be switched individually into an active position, preferably the switching of the pressure shoe members into the operative position can be controlled by the at least one sensor. On this way it is possible to get even machining too to be achieved if the grinding head has a longitudinal direction Edge lying in the direction of travel.
- the type of travel depends on the shape and possibly the grain direction the wooden surface.
- Travel parallel travel is offset so that ground the surface of the workpiece in parallel grinding tracks becomes.
- the execution of a cross cut is then easily possible by rotating the grinding head by 90 ° and then perpendicular to the previous travel paths is driven over the workpiece in parallel paths.
- the grinding head can expediently be rotated by that the grinding head on an X-Y traversing device an axis of rotation perpendicular to the workpiece receiving plane is pivotally attached.
- the sensor recognizing the edges of the workpiece can be by parallel to the pressure bar on the leading or trailing edge arranged sensor strips of the grinding head. These can take into account the travel speed of the grinding head the end of the workpiece in the direction of travel recognize and make the reversal, the arrangement the sensor strips on the leading and trailing edge allows that move the grinding head forwards and backwards over the workpiece can.
- the Height-adjustable grinding head attached.
- the Grinding head equipped with at least one distance sensor is, it is possible that the grinding head changes follows the distance, for example also with curved ones Workpieces allow a perfect grinding result.
- the pressure bar is vertical a spherical to the direction of movement of the grinding belt Has curvature because of the resulting linear Uniform grinding processing even with bulges is possible.
- the workpiece in the grinding machine according to the invention can also be moved in principle, it is preferred that the workpiece receiving plane through a stationary workpiece table is formed, which is preferably a holding device for the stationary mounting of the workpiece in the workpiece receiving plane having.
- Figure 1 shows a rectangular workpiece table 1, the long one Edges of guide rails 2 are limited.
- a portal 3 in the longitudinal direction of the table movable.
- a support arm 4 in the longitudinal direction of the portal 3, that is perpendicular to the longitudinal axis 5 of the workpiece table 1, movably mounted.
- a Grinding head 6 attached on the support arm 4 .
- the movable portal 3 and the on the bracket 3 movable arm 4 form a conventional X-Y traversing device 3, 4.
- the grinding head 6 is on the support arm 4 around a swivel joint 7 perpendicular to the X-Y plane pivotable.
- Figure 1 shows a in the solid lines first position of the grinding head 6 and in dashed lines a second position of the grinding head pivoted through 90 ° 6.
- FIG. 1 shows 6 in the representations of the grinding head schematically indicated the longitudinal extent of a pressure bar 8.
- FIGS. 2 and 3 show that the workpiece table 1 consists of a conventional base 9, on which there is a Workpiece receiving level 10 is located to receive a Workpiece 11 is used.
- FIG. 4 illustrates the machining of a workpiece 11 a starting position of the grinding head 6, in which this located at an end edge of the workpiece 11 so that the portal 3 moved into an end position with respect to the workpiece 11 by moving the support arm 4 along the portal 3 perpendicular to the longitudinal axis 5 of the workpiece table 1 on a move first travel path 14.
- the first travel path 14 is ended and the grinding head 6 reversed by lateral displacement so that it is on a to the first travel path 14 parallel travel path 14 'in the reverse direction is moved over the workpiece 11.
- a subsequent grinding on each other becomes like this parallel grinding tracks in the transverse direction of the workpiece 11 performed until the surface is completely sanded is.
- the grinding head 6 is then turned 90 ° around the axis of rotation 7 pivots, as is the case by the web 16 in FIG. 4 is indicated. Then the surface is moved by moving the Grinding head 6 perpendicular to parallel travel paths 17, 17 ' to the first traverse paths 14, 14 ', so that a complete cross-cut has been produced.
- FIGS 5 and 6 illustrate the structure of a grinding head 6 in a first embodiment.
- a grinding belt over three pulleys 13 two Deflection rollers 13 arranged parallel to the workpiece receiving plane 10 are and take up the pressure bar 8 between them.
- the pressure bar consists of a A plurality of link pressure shoes 18, individually, for example by electromagnets or by compressed air, in the operative position are controllable.
- the movement of the grinding head 6 over the workpiece takes place perpendicular to the longitudinal axis 8 'in one Travel axis 19.
- the Grinding head 6 On a leading edge and a trailing edge Edge with respect to the direction of travel 19 is the Grinding head 6 each provided with a sensor strip 20, 21, on which a plurality of sensors 22 are arranged side by side are.
- the sensors 22 can be capacitive, for example Sensors that are capable of a wooden workpiece 11 in capacitively detect a distance of a few millimeters.
- the sensors 22 are expediently individual individual pressure shoes 18 assigned. Detect the sensors 22 that the Grinding head 6 over a lying in the direction of movement 19 Long edge of the workpiece 11 moves, they are no longer on the workpiece 11 hitting link pressure shoes 18 in an ineffective Position, as is known per se, to to avoid grinding the workpiece edges.
- Figure 7 shows an embodiment of the grinding head 6, at whose effective tool surface 23 in the direction of movement 19 is domed and therefore on a width of the pressure beam 8 narrower line on the workpiece 11 ' takes effect.
- the workpiece 11 ' is shown arched in FIG. 7.
- the grinding head 6 follows this curvature in that it is attached to a height-adjustable support arm 4 ', as indicated in Figure 8.
- the sensors 22 of the leading sensor strip 21 also as distance sensors used or a separate distance sensor is installed, the height adjustment of the grinding head 6 and his Carrier arms 4 'on the portal 3 controls so that the grinding head 6th the curvature contour of the workpiece 11 'can follow.
- the corresponding sensors 22 are also suitable automatic adjustment to workpieces of different thicknesses bring about.
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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)
- Disintegrating Or Milling (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
Description
Die Erfindung betrifft eine Schleifmaschine mit wenigstens einem Schleifkopf mit einem Schleifband, das mittels eines Druckbalkens auf ein relativ zum Schleifkopf bewegtes Werkstück gedrückt wird, wobei der Schleifkopf über die Oberfläche des Werkstücks verfahrbar ausgebildet ist.The invention relates to a grinding machine with at least a grinding head with a sanding belt, which is by means of a Pressure bar on a workpiece moved relative to the grinding head is pressed, the grinding head over the surface of the workpiece is designed to be movable.
Derartige Schleifmaschinen sind in zahlreichen Ausführungsformen bekannt. Bei diesen Bandschleifmaschinen wird das Werkstück auf ein Förderband gelegt und unter dem angetriebenen und gegen die Oberfläche des Werkstücks gedrückten Schleifband hindurch gefördert. Um ein verbessertes Schleifergebnis durch mehrere Schleifrichtungen zu erzielen, ist es bekannt, einen Kreuzschliff auszuführen, indem die Oberfläche des Werkstücks in zwei zueinander senkrecht stehenden Richtungen geschliffen wird. Schleifmaschinen, die einen derartigen Kreuzschliff in einem Durchgang ausführen, sind notwendigerweise große Anlagen, die einen erheblichen Investitionsaufwand erfordern.Such grinding machines are in numerous embodiments known. With these belt grinding machines, the workpiece placed on a conveyor belt and under the driven and abrasive belt pressed against the surface of the workpiece promoted through. To achieve an improved grinding result to achieve multiple grinding directions, it is known to Perform cross sanding by the surface of the workpiece ground in two mutually perpendicular directions becomes. Grinding machines that have such a cross grinding in in one pass are necessarily large plants, that require a significant investment.
Um einen Kreuzschliff zu erzeugen, ist es auch möglich, das Werkstück durch eine kleinere Schleifbandmaschine mit nur einem Schleifband hindurch zu transportieren und nach dem Durchlaufen das Werkstück in einer um 90° gedrehten Lage erneut durch dieselbe Schleifmaschine durchlaufen zu lassen. Diese Arbeitsweise erfordert einen nicht unerheblichen Bedienaufwand, da größere Werkstücke durch zwei Personen am Auslauf der Maschine erfaßt, erneut zum Einlauf transportiert und in gedrehter Form wieder in die Maschine geschoben werden müssen.To create a cross cut, it is also possible to do that Workpiece through a smaller sanding belt machine with only one Transport sanding belt through and after passing through the workpiece again in a position rotated by 90 ° to run through the same grinder. This Working method requires a not inconsiderable operating effort, because larger workpieces by two people at the outlet of the Machine detected, transported to the inlet again and in the rotated Form must be pushed back into the machine.
Durch JP-A-59-115155 ist eine Schleifmaschine bekannt, die speziell zum Schleifen von Holzrahmen vorgesehen ist. Der Holzrahmen wird auf einem Förderband positioniert, auf dem er in Förderrichtung bewegbar ist. Auf einem Portal ist ein Schleifkopf quer zur Förderrichtung verfahrbar montiert. Für das Schleifen des Rahmens wird der Schleifkopf an einer Ausgangsecke positioniert und in Richtung des jeweiligen geradlinigen Rahmenabschnitts bewegt, und zwar entweder durch die Bewegung des Schleifkopfes am Portal oder durch eine entsprechende Vorförderung des Werkstücks. Der Schleifkopf ist durch ein umlaufendes Schleifband mit einem Druckschuh gebildet, und wird für das Schleifen eines rechtwinkelig zu dem vorher geschliffenen Rahmenteil stehenden Rahmenteils um 90° gedreht. Die Ausführung mehrerer Schleifrichtungen auf einem Rahmenteil selbst ist nicht vorgesehen.From JP-A-59-115155 a grinding machine is known which is specially designed for sanding wooden frames. Of the Wooden frame is positioned on a conveyor belt on which it is movable in the conveying direction. There is a on a portal The grinding head is mounted so that it can move across the conveying direction. For Grinding the frame becomes the grinding head at an exit corner positioned and towards the respective rectilinear Frame section moves, either through the Movement of the grinding head on the portal or by an appropriate one Advance of the workpiece. The grinding head is formed by an all-round sanding belt with a pressure shoe, and becomes perpendicular to that for grinding one previously ground frame part standing frame part by 90 ° turned. The execution of several grinding directions on one Frame part itself is not provided.
Im Stand der Technik ist das Problem vorhanden, daß entweder ein erheblicher maschineller oder ein erheblicher Bedienaufwand erforderlich ist, um eine hochqualitative Oberflächenbearbeitung zu erzielen. Die der Erfindung zugrundeliegende Problemstellung besteht darin, eine Schleifmaschine anzugeben, die bezüglich des geschilderten Problems Verbesserungen ermöglicht.The problem in the prior art is that either a considerable mechanical or a considerable operating effort is required to get a high quality surface finish to achieve. The problem underlying the invention consists of specifying a grinding machine which enables improvements to be made to the problem described.
Zur Lösung des gestellten Problems ist erfindungsgemäß eine Schleifmaschine der eingangs erwähnten Art dadurch gekennzeichnet, daß wenigstens ein Sensor einen im Verfahrweg des Schleifkopfes liegenden Rand des Werkstücks detektiert, daß eine Steuerung den Verfahrweg entsprechend dem detektierten Rand begrenzt und die Bewegung des Schleifkopfes umsteuert, daß der Druckbalken aus einer Vielzahl von Druckschuhgliedern besteht, die einzeln in eine Wirkposition schaltbar sind und daß die Schaltung der Druckschuhglieder in die Wirkposition durch den wenigstens einen Sensor steuerbar ist.According to the invention, one is to solve the problem posed Grinding machine of the type mentioned in the introduction, that at least one sensor one in the travel of Abrasive head lying edge of the workpiece detects that a controller determines the travel distance according to the detected one Limited edge and reversed the movement of the grinding head, that the pressure beam from a variety of pressure shoe members exists, which are individually switchable into an active position and that the circuit of the pressure shoe members in the operative position can be controlled by the at least one sensor.
In Abkehr von den bisherigen Bauarten einer Schleifmaschine, bei denen der Schleifkopf mit dem Schleifband ortsfest montiert ist und das Werkstück unter dem Schleifkopf hindurch transportiert wird, sieht die erfindungsgemäße Schleifmaschine einen bewegten Schleifkopf vor, der über die Oberfläche des Werkstücks bewegbar ist, so daß das Werkstück selbst im Stillstand bleiben kann. Die Bewegung des Schleifkopfes über die Oberfläche des Werkstückes wird dabei automatisch gesteuert. Hierzu wird der Schleifkopf aus einer Ausgangsstellung in einem ersten Verfahrweg über die Oberfläche des Werkstücks verfahren. Ein Sensor des Schleifkopfes erkennt einen Rand des Werkstückes, der im Verfahrweg des Schleifkopfes liegt und bewirkt über eine Steuerung eine Umsteuerung der Bewegung des Schleifkopfes, woraufhin dieser vorzugsweise automatisch auf einem anderen Verfahrweg über das Werkstück geführt wird. Die Steuerung ist dabei so eingestellt, daß die gesamte Oberfläche des Werkstücks von dem Schleifkopf erfaßt wird, also geschliffen wird. Der Druckbalken der erfindungsgemäßen Schleifmaschine besteht in an sich beispielsweise aus der EP 0 155 380 B1 bekannter Weise aus einer Vielzahl von Druckschuhgliedern, die einzeln in eine Wirkposition schaltbar sind, wobei vorzugsweise die Schaltung der Druckschuhglieder in die Wirkposition durch den wenigstens einen Sensor steuerbar ist. Auf diese Weise ist es möglich, eine gleichmäßige Bearbeitung auch dann zu erreichen, wenn der Schleifkopf über eine längs zur Verfahrrichtung liegende Kante fährt.In departure from the previous types of grinding machine, where the grinding head is stationary with the grinding belt is mounted and the workpiece under the grinding head is transported, sees the grinding machine according to the invention a moving grinding head over the surface of the Workpiece is movable so that the workpiece even when stationary can stay. The movement of the grinding head over the The surface of the workpiece is automatically controlled. For this purpose, the grinding head is moved from a starting position in one Move the first travel path over the surface of the workpiece. A sensor of the grinding head detects an edge of the Workpiece that lies in the travel of the grinding head and causes a reversal of the movement of the Grinding head, whereupon this preferably automatically another path is guided over the workpiece. The Control is set so that the entire surface of the workpiece is grasped by the grinding head, ie ground becomes. The pressure beam of the grinding machine according to the invention consists in itself, for example, of EP 0 155 380 B1 known manner from a large number of pressure shoe members, which can be switched individually into an active position, preferably the switching of the pressure shoe members into the operative position can be controlled by the at least one sensor. On this way it is possible to get even machining too to be achieved if the grinding head has a longitudinal direction Edge lying in the direction of travel.
Die Art der Verfahrwege hängt von der Form und ggf. der Maserungsrichtung der Holzoberfläche ab.The type of travel depends on the shape and possibly the grain direction the wooden surface.
Insbesondere für rechteckige Werkstücke wird es zweckmäßig sein, wenn der Schleifkopf zur Umsteuerung auf einen zum beendeten Verfahrweg parallelen Verfahrweg versetzt wird, so daß die Oberfläche des Werkstücks in parallelen Schleifbahnen geschliffen wird. Die Durchführung eines Kreuzschliffs ist dann ohne weiteres dadurch möglich, daß der Schleifkopf um 90° gedreht und anschließend senkrecht zu den bisherigen Verfahrwegen in parallelen Bahnen über das Werkstück gefahren wird. Die Drehung des Schleifkopfes kann zweckmäßigerweise dadurch erfolgen, daß der Schleifkopf an einer X-Y-Verfahreinrichtung um eine senkrecht zur Werkstückaufnahmeebene stehende Drehachse schwenkbar angebracht ist.It is particularly useful for rectangular workpieces be when the grinding head to switch to one to the ended Travel parallel travel is offset so that ground the surface of the workpiece in parallel grinding tracks becomes. The execution of a cross cut is then easily possible by rotating the grinding head by 90 ° and then perpendicular to the previous travel paths is driven over the workpiece in parallel paths. The The grinding head can expediently be rotated by that the grinding head on an X-Y traversing device an axis of rotation perpendicular to the workpiece receiving plane is pivotally attached.
Der die Ränder des Werkstücks erkennende Sensor kann durch parallel zum Druckbalken an dem vor- bzw. nachlaufenden Rand des Schleifkopfes angeordnete Sensorleisten gebildet sein. Diese können unter Berücksichtigung der Verfahrgeschwindigkeit des Schleifkopfes das Ende des Werkstückes in Verfahrrichtung erkennen und die Umsteuerung vornehmen, wobei die Anordnung der Sensorleisten am vor- und nachlaufenden Rand erlaubt, daß der Schleifkopf vorwärts und rückwärts über das Werkstück verfahren kann.The sensor recognizing the edges of the workpiece can be by parallel to the pressure bar on the leading or trailing edge arranged sensor strips of the grinding head. These can take into account the travel speed of the grinding head the end of the workpiece in the direction of travel recognize and make the reversal, the arrangement the sensor strips on the leading and trailing edge allows that move the grinding head forwards and backwards over the workpiece can.
Es ist aber auch möglich, die Ränder des Werkstücks in anderer Weise festzustellen. So kann es sich anbieten, auf dem Schleifkopf eine Kamera anzubringen, die die Kontur des Werkstückes, zumindest in Verfahrrichtung gesehen, erkennt. Es ist aber auch denkbar, daß eine Kamera die komplette Kontur eines Werkstücks aufnimmt und die Steuerung daraus die Bewegung des Schleifkopfes für die komplette Bearbeitung des Werkstückes ermittelt.But it is also possible to change the edges of the workpiece in another Way to determine. So it can offer itself on the Attaching a camera to the grinding head, the contour of the workpiece, seen at least in the direction of travel, recognizes. It is but also conceivable that a camera the complete contour of a Workpiece and controls the movement of the Grinding head for the complete machining of the workpiece determined.
In einer weitere Vorteile bietenden Ausführungsform ist der Schleifkopf höhenverstellbar befestigt. Hierdurch kann eine Anpassung auf verschiedene Werkstückdicken erfolgen. Wenn der Schleifkopf mit wenigstens einem Abstandssensor ausgestattet ist, ist es möglich, daß der Schleifkopf etwaigen Änderungen des Abstandes folgt, also beispielsweise auch bei gewölbten Werkstücken ein einwandfreies Schleifergebnis ermöglicht.In a further advantageous embodiment, the Height-adjustable grinding head attached. As a result, a Adaptation to different workpiece thicknesses. If the Grinding head equipped with at least one distance sensor is, it is possible that the grinding head changes follows the distance, for example also with curved ones Workpieces allow a perfect grinding result.
Hierbei kann es zweckmäßig sein, wenn der Druckbalken senkrecht zur Bewegungsrichtung des Schleifbandes eine ballige Wölbung aufweist, da durch die daraus resultierende linienförmige Auflage auch bei Wölbungen eine gleichmäßige Schleifbearbeitung möglich ist.It can be useful if the pressure bar is vertical a spherical to the direction of movement of the grinding belt Has curvature because of the resulting linear Uniform grinding processing even with bulges is possible.
Obwohl das Werkstück bei der erfindungsgemäßen Schleifmaschine grundsätzlich auch bewegt werden kann, ist es bevorzugt, daß die Werkstückaufnahmeebene durch einen ortsfesten Werkstücktisch gebildet ist, der vorzugsweise eine Halteeinrichtung für die ortsfeste Halterung des Werkstücks in der Werkstückaufnahmeebene aufweist. Although the workpiece in the grinding machine according to the invention can also be moved in principle, it is preferred that the workpiece receiving plane through a stationary workpiece table is formed, which is preferably a holding device for the stationary mounting of the workpiece in the workpiece receiving plane having.
Die Erfindung wird im folgenden anhand von in der Zeichnung dargestellten Ausführungsbeispielen näher erläutert. Es zeigen:
- Figur 1 -
- eine Draufsicht auf einen Werkstücktisch mit einem verfahrbaren Portal, an dem ein Schleifkopf schwenkbar angebracht ist,
- Figur 2 -
- eine Ansicht auf eine Längsseite der Anordnung gemäß Figur 1,
- Figur 3 -
- eine Ansicht auf eine Stirnseite der Anordnung gemäß Figur 1,
- Figur 4 -
- eine Draufsicht auf die Vorrichtung gemäß Figur 1 mit eingezeichneten Verfahrwegen für die Durchführung eines Kreuzschliffs,
- Figur 5 -
- einen vertikalen Schnitt durch ein erstes Ausführungsbeispiel eines Schleifkopfes,
- Figur 6 -
- einen horizontalen Schnitt durch den Schleifkopf gemäß Figur 5,
- Figur 7 -
- einen vertikalen Schnitt durch eine zweite Ausführungsform eines Schleifkopfes, der über eine gewölbte Oberfläche bewegt wird,
- Figur 8 -
- einen horizontalen Schnitt durch einen Schleifkopf und seine Befestigung an dem verfahrbaren Portal.
- Figure 1 -
- a plan view of a workpiece table with a movable portal on which a grinding head is pivotally attached,
- Figure 2 -
- 2 shows a view of a long side of the arrangement according to FIG. 1,
- Figure 3 -
- 2 shows a view of an end face of the arrangement according to FIG. 1,
- Figure 4 -
- 2 shows a top view of the device according to FIG. 1 with traversed travel paths for carrying out a cross grinding,
- Figure 5 -
- a vertical section through a first embodiment of a grinding head,
- Figure 6 -
- 4 shows a horizontal section through the grinding head according to FIG. 5,
- Figure 7 -
- a vertical section through a second embodiment of a grinding head, which is moved over a curved surface,
- Figure 8 -
- a horizontal section through a grinding head and its attachment to the movable portal.
Figur 1 zeigt einen rechteckigen Werkstücktisch 1, dessen lange
Kanten von Führungsschienen 2 begrenzt sind. Auf den Führungsschienen
2 ist ein Portal 3 in Längsrichtung des Tisches
verfahrbar. An dem Portal 3 ist ein Tragarm 4 in Längsrichtung
des Portals 3, also senkrecht zur Längsachse 5 des Werkstücktisches
1, verfahrbar montiert. An dem Tragarm 4 ist ein
Schleifkopf 6 befestigt. Das verfahrbare Portal 3 und der an
dem Portal 3 verfahrbare Tragarm 4 bilden eine übliche X-Y-Verfahreinrichtung
3, 4. Der Schleifkopf 6 ist an dem Tragarm
4 um ein senkrecht zu der X-Y-Ebene stehendes Drehgelenk 7
verschwenkbar. Figur 1 zeigt in den durchgezogenen Linien eine
erste Stellung des Schleifkopfes 6 und in gestrichelten Linien
eine um 90° dazu verschwenkte zweite Stellung des Schleifkopfes
6. In Figur 1 ist in den Darstellungen des Schleifkopfes 6
schematisch die Längserstreckung eines Druckbalkens 8 angedeutet.Figure 1 shows a rectangular workpiece table 1, the long one
Edges of guide rails 2 are limited. On the guide rails
2 is a portal 3 in the longitudinal direction of the table
movable. On the
Die Figuren 2 und 3 lassen erkennen, daß der Werkstücktisch 1
aus einem üblichen Untergestell 9 besteht, auf dem sich eine
Werkstückaufnahmeebene 10 befindet, die zur Aufnahme eines
Werkstücks 11 dient.FIGS. 2 and 3 show that the workpiece table 1
consists of a
In den Figuren 2 und 3 ist innerhalb des Schleifkopfes 6 eine
übliche Führung eines Schleifbandes 12 um drei Rollen 13 angedeutet.
Figur 3 zeigt den Schleifkopf 6 wieder in zwei zueinander
um 90° verschwenkten Stellungen.In Figures 2 and 3 there is a 6 within the grinding head
usual guidance of an
Figur 4 verdeutlicht die Bearbeitung eines Werkstücks 11. Aus
einer Ausgangsstellung des Schleifkopfes 6, in der sich dieser
an einer Endkante des Werkstücks 11 befindet, so daß das Portal
3 in eine Endstellung bezüglich des Werkstücks 11 gefahren
ist, wird durch Verfahren des Tragarms 4 entlang dem Portal 3
senkrecht zur Längsachse 5 des Werkstücktisches 1 auf einem
ersten Verfahrweg 14 verfahren. Nach Überfahren eines in dem
Verfahrweg 14 liegenden, detektierten Randes 15 des Werkstücks
11 wird der erste Verfahrweg 14 beendet und der Schleifkopf 6
durch seitliches Versetzen umgesteuert, so daß er auf einem
zum ersten Verfahrweg 14 parallelen Verfahrweg 14' in Rückwärtsrichtung
über das Werkstück 11 verfahren wird. Auf diese
Weise wird ein aneinander anschließendes Schleifen auf zueinander
parallelen Schleifbahnen in Querrichtung des Werkstücks
11 durchgeführt, bis die Oberfläche vollständig geschliffen
ist. Anschließend wird der Schleifkopf 6 um 90° um die Drehachse
7 verschwenkt, wie dies durch die Bahn 16 in Figur 4
angedeutet ist. Danach wird die Oberfläche durch Bewegung des
Schleifkopfes 6 auf parallelen Verfahrwegen 17, 17' senkrecht
zu den ersten Verfahrwegen 14, 14' überstrichen, so daß ein
vollständiger Kreuzschliff hergestellt worden ist.FIG. 4 illustrates the machining of a workpiece 11
a starting position of the grinding
Die Figuren 5 und 6 verdeutlichen den Aufbau eines Schleifkopfes
6 in einer ersten Ausführungsform. In üblicher Weise wird
ein Schleifband über drei Umlenkrollen 13 geführt, wobei zwei
Umlenkrollen 13 parallel zur Werkstückaufnahmeebene 10 angeordnet
sind und zwischen sich den Druckbalken 8 aufnehmen.Figures 5 and 6 illustrate the structure of a grinding
Wie Figur 6 verdeutlicht, besteht der Druckbalken aus einer
Mehrzahl von Gliederdruckschuhen 18, die einzeln, beispielsweise
durch Elektromagneten oder durch Druckluft, in die Wirkposition
steuerbar sind. Die Bewegung des Schleifkopfes 6 über
das Werkstück erfolgt senkrecht zur Längsachse 8' in einer
Verfahrachse 19. An einer vorlaufenden Kante und einer nachlaufenden
Kante bezüglich der Verfahrrichtung 19 ist der
Schleifkopf 6 mit jeweils einer Sensorleiste 20, 21 versehen,
auf denen nebeneinander eine Vielzahl von Sensoren 22 angeordnet
sind. Die Sensoren 22 können beispielsweise kapazitive
Sensoren sein, die in der Lage sind, ein Holzwerkstück 11 in
einem Abstand von einigen Millimetern kapazitiv zu detektieren.As shown in Figure 6, the pressure bar consists of a
A plurality of link pressure shoes 18, individually, for example
by electromagnets or by compressed air, in the operative position
are controllable. The movement of the grinding
Zweckmäßigerweise sind die Sensoren 22 einzelnen Gliederdruckschuhen
18 zugeordnet. Erkennen die Sensoren 22, daß der
Schleifkopf 6 über eine in Bewegungsrichtung 19 liegende
Längskante des Werkstücks 11 fährt, werden die nicht mehr auf
das Werkstück 11 treffenden Gliederdruckschuhe 18 in eine unwirksame
Stellung verfahren, wie dies an sich bekannt ist, um
ein Rundschleifen der Werkstückkanten zu vermeiden.The sensors 22 are expediently individual individual pressure shoes
18 assigned. Detect the sensors 22 that the
Grinding
Figur 7 zeigt eine Ausführungsform des Schleifkopfes 6, bei
dem seine wirksame Werkzeugfläche 23 in Bewegungsrichtung 19
ballig gewölbt ist und daher auf einer gegenüber der Breite
des Druckbalkens 8 schmaleren Linie auf dem Werkstück 11'
wirksam wird. Das Werkstück 11' ist in Figur 7 gewölbt dargestellt.
Der Schleifkopf 6 folgt dieser Wölbung dadurch, daß er
an einem höhenverstellbar geführten Tragarm 4' befestigt ist,
wie dies in Figur 8 angedeutet ist. Hierzu werden die Sensoren
22 der vorlaufenden Sensorleiste 21 auch als Abstandssensoren
benutzt oder es wird ein gesonderter Abstandssensor montiert,
der die Höheneinstellung des Schleifkopfes 6 und seines
Tragarms 4' an dem Portal 3 steuert, so daß der Schleifkopf 6
der Wölbungskontur des Werkstücks 11' folgen kann. Selbstverständlich
sind die entsprechenden Sensoren 22 auch geeignet,
eine automatische Anpassung an unterschiedlich dicke Werkstücke
herbeizuführen.Figure 7 shows an embodiment of the grinding
Anhand der Zeichnung ist ein Kreuzschliff für ein rechteckiges
Werkstück dargestellt worden. Selbstverständlich ist es möglich,
andere Bewegungsbahnen vorzusehen, wenn dies aufgrund
der Maserungsrichtungen der Holzoberfläche oder einer anderen
Form des Werkstücks (z.B. runde Tischplatte) erforderlich oder
zweckmäßig erscheint. Naturgemäß kann dabei die Länge des
Druckbalkens 8 variiert werden und sich ggf. auf einen einzigen
Druckschuh reduzieren, der darüber hinaus geeignet geformt
sein kann.Based on the drawing is a cross cut for a rectangular
Workpiece has been represented. Of course it is possible
to provide other trajectories if this is due to
the grain directions of the wood surface or another
Shape of the workpiece (e.g. round table top) required or
seems appropriate. Naturally, the length of the
Claims (12)
- Grinding machine having at least one grinding attachment (6) with a grinding belt (12), which is pressed by means of a pressure bar (8) onto a workpiece (11, 11') displaced relative to the grinding attachment (6), the grinding attachment (6) being designed to travel over the surface of the workpiece (11, 11'), characterised in that at least one sensor (20, 21) detects one edge (15) of the workpiece (11, 11') located in the traverse path (14, 14'; 17, 17') of the grinding attachment (6), that a controller limits the traverse path (14, 14'; 17, 17') in accordance with the detected edge (15) and reverses the direction of movement of the grinding attachment (6), that the pressure bar (8) consists of a number of pressure shoe elements (18), which can be individually set to an operating position, and that the setting of the pressure shoe elements (18) to the operating position can be controlled by the at least one sensor (20, 21).
- Grinding machine according to Claim 1, characterised in that after the direction reversal, the controller guides the sanding attachment (6) along another traverse path (14', 17') over the workpiece.
- Grinding machine according to Claim 2, characterised in that for the direction reversal the grinding attachment (6) is displaced onto a traverse path (14', 17') which is parallel to the completed traverse path (14, 17).
- Grinding machine according to Claim 3, characterised in that after sweeping over the surface of the workpiece (11, 11') in first parallel traverse paths (14), the grinding attachment is slewed through 90° and is moved over the surface along second parallel traverse paths (17) lying perpendicular to the first parallel traverse paths (14).
- Grinding machine according to one of Claims 1 to 4, characterised in that the grinding attachment (6) is swivel-mounted on a swivelling axis (7) on an X-Y traversing device (3, 4), perpendicular to the feed plane (10) of the workpiece.
- Grinding machine according to one of Claims 1 to 5, characterised in that the at least one sensor is formed by sensor strips (20, 21) arranged parallel to the pressure bar (8) at the leading or trailing edge of the grinding attachment (6).
- Grinding machine according to one of Claims 1 to 6, characterised in that the grinding attachment (6) is mounted in a height-adjustable manner.
- Grinding machine according to one of Claims 1 to 7, characterised in that the grinding attachment (6) is equipped with at least one proximity sensor.
- Grinding machine according to Claims 7 and 8, characterised in that the height adjustment of the grinding attachment (6) is effected automatically in relation to the measuring signal of the proximity sensor.
- Grinding machine according to one of Claims 1 to 9, characterised in that the pressure bar (8) has a spherical camber which is perpendicular to the direction of travel of the grinding belt (12).
- Grinding machine according to one of Claims 1 to 10, characterised in that the feed plane (10) of the workpiece is formed by a stationary work table (1).
- Grinding machine according to one of Claims 1 to 11, characterised by the use of capacitive sensors (22) in at least one sensor strip (20, 21).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4316588 | 1993-05-18 | ||
DE4316588A DE4316588C1 (en) | 1993-05-18 | 1993-05-18 | Grinding machine with an abrasive belt |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0625407A1 EP0625407A1 (en) | 1994-11-23 |
EP0625407B1 true EP0625407B1 (en) | 1998-01-21 |
Family
ID=6488369
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94107666A Expired - Lifetime EP0625407B1 (en) | 1993-05-18 | 1994-05-18 | Grinding machine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0625407B1 (en) |
AT (1) | ATE162447T1 (en) |
DE (2) | DE4316588C1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10346202A1 (en) * | 2003-08-15 | 2005-03-17 | Supfina Grieshaber Gmbh & Co. Kg | Machine for belt grinding of workpiece surfaces of a workpiece |
ITMO20060119A1 (en) * | 2006-04-11 | 2007-10-12 | Scm Group Spa | DRIVE DEVICE |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2480173A1 (en) * | 1980-04-15 | 1981-10-16 | Virelec | Machine for polishing monumental stone - uses grinders on slide traversing beam which travels on rails and uses detectors to control movement |
JPS59115155A (en) * | 1982-12-22 | 1984-07-03 | Takegawa Tekko Kk | Grinding machine of frame object for woodwork |
DE3402104C2 (en) * | 1984-01-21 | 1986-07-17 | Karl Heesemann Maschinenfabrik GmbH & Co KG, 4970 Bad Oeynhausen | Belt grinder |
DE4214347A1 (en) * | 1991-05-07 | 1992-11-12 | Fritz Gebhardt | Power wood-grinding machine - has grinding table and exhaustion head movable on three axes in relation to each other |
-
1993
- 1993-05-18 DE DE4316588A patent/DE4316588C1/en not_active Expired - Lifetime
-
1994
- 1994-05-18 AT AT94107666T patent/ATE162447T1/en not_active IP Right Cessation
- 1994-05-18 EP EP94107666A patent/EP0625407B1/en not_active Expired - Lifetime
- 1994-05-18 DE DE59405063T patent/DE59405063D1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE59405063D1 (en) | 1998-02-26 |
EP0625407A1 (en) | 1994-11-23 |
ATE162447T1 (en) | 1998-02-15 |
DE4316588C1 (en) | 1994-09-08 |
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