EP0127760A1 - Belt sanding machine - Google Patents

Belt sanding machine Download PDF

Info

Publication number
EP0127760A1
EP0127760A1 EP84104749A EP84104749A EP0127760A1 EP 0127760 A1 EP0127760 A1 EP 0127760A1 EP 84104749 A EP84104749 A EP 84104749A EP 84104749 A EP84104749 A EP 84104749A EP 0127760 A1 EP0127760 A1 EP 0127760A1
Authority
EP
European Patent Office
Prior art keywords
belt
housing part
spacers
grinding machine
spacer
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
EP84104749A
Other languages
German (de)
French (fr)
Other versions
EP0127760B1 (en
Inventor
Kurt Fischer
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.)
Bison Werke Baehre and Greten GmbH and Co KG
Original Assignee
Bison Werke Baehre and Greten GmbH and Co KG
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 Bison Werke Baehre and Greten GmbH and Co KG filed Critical Bison Werke Baehre and Greten GmbH and Co KG
Priority to AT84104749T priority Critical patent/ATE32573T1/en
Publication of EP0127760A1 publication Critical patent/EP0127760A1/en
Application granted granted Critical
Publication of EP0127760B1 publication Critical patent/EP0127760B1/en
Expired legal-status Critical Current

Links

Images

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
    • B24B21/04—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces
    • B24B21/10—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces involving a rigid member, e.g. pressure bar, table, pressing or supporting the belt over substantially its whole span
    • 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
    • B24B21/12—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces involving a contact wheel or roller pressing the belt against the work

Definitions

  • the invention relates to a belt grinding machine for processing chipboard, fiber, veneer or the like - plates with an upper and a lower housing part, between which the plates to be ground can be passed, the upper housing part can be raised by a lifting device to adapt to different plate thicknesses and can be placed on both longitudinal sides of the belt grinding machine between the upper and lower housing part, spaced apart spacers for the basic thickness setting, and with at least one belt grinding unit housed in the housing parts, in which the grinding belt via a contact roller and / or a corresponding pressure beam is guided and a counter pressure roller opposite her or him and pressing the workpiece against him or him or a further contact roller opposite the contact roller with grinding belt and guiding a grinding belt is provided.
  • a belt grinder of this type is known from DE-PS 1 677 135.
  • a force accumulator is provided in this known belt grinding machine which constantly presses the counter-pressure roller in the direction of the respective pressure element and thus onto the grinding belt. This ensures that irregularities in the surface treatment are avoided even when the grinding belt swings up and down and that a constant and precise machining depth is achieved even when such vibrations occur.
  • a belt grinding machine with at least one belt grinding unit which has a contact roller guiding the grinding belt and / or a corresponding pressure beam and is provided with an opposing pressure roller opposite it and pressing the workpiece against it , wherein the counter-pressure roller on the side facing away from the contact roller or the pressure beam at least one backup roller is assigned, which can be pressed onto the counter-pressure roller by means of a piston-cylinder unit.
  • the object of the invention is to design a belt grinding machine of the type defined at the outset in such a way that, in the case of heavy as well as medium-weight and lighter frame constructions, plates of widely differing thicknesses can be processed with a high level of grinding accuracy, even if the plates supplied are relatively large Show thickness fluctuations.
  • each spacer is assigned a continuously height-adjustable loading element which can be acted upon by an adjustable fluid pressure medium and which can be pressed against the spacer in the lowered state of the upper housing part.
  • spacers it is particularly advantageous to design the spacers to be infinitely adjustable, since it is then possible, through the interaction of these infinitely adjustable spacers, with the load elements that can be acted upon with fluid pressure medium set the grinding gap so precisely that the facilities required for conventional belt grinding machines for fine adjustment of the respective contact rollers are no longer required.
  • At least some of the loading elements are advantageously designed in the form of a double-acting cylinder-piston unit, so that these loading elements can perform a double function in such a way that on the one hand they perform their actual function, namely the axial bracing of the spacing elements between the lower housing part and the upper housing part, and on the other hand they are used for this purpose can raise the upper housing part relative to the lower housing part to open the belt sander or to enable the adjustment of the desired grinding gap by lifting the upper housing part.
  • the loading element and the associated spacer are advantageously arranged directly adjacent to one another and distributed over the length of the belt grinding machine in such a way that a deformation-free bracing of the lower housing part and upper housing part is ensured.
  • each spacer consists of a screw spindle with an associated fixed stop, the screw spindle, which can be actuated by hand or via an actuator, being guided in a threaded block provided on one housing part and engaging in a support sleeve fastened to the other housing part.
  • the spacers are coupled via an actuating device and jointly adjustable, whereby at least one spacer can be assigned a position transmitter which always provides exact information about the clear width of the grinding gap, which is predetermined by the spacers.
  • a pressure limiting device which can consist, for example, of at least one pressure relief valve, ensures that the pressure limiting device responds in the event of a thickness deviation that is too great in relation to the specified target thickness of the respective plate and suddenly reduces the clamping pressure of the loading elements, so that there is a risk of damage for the sanding belt units.
  • spacers and load elements are designed as an integral unit, the preferably continuously adjustable part of the spacer preferably consisting of a support sleeve screwed to the cylinder of the cylinder-piston unit, which with a fixed stop surrounding the piston of the cylinder-piston unit on the Cylinder of the cylinder-piston unit cooperating opposite housing part.
  • This compact design simplifies assembly and makes it easier to arrange the spacer and load unit within the machine at the optimal positions.
  • the invention is explained below using an exemplary embodiment with reference to the drawing.
  • the single figure of the drawing shows a schematic side view of an embodiment of the belt grinder according to the invention.
  • the belt grinder comprises an upper housing part 1 and a lower housing part 2, in which carrier units 3 are held opposite one another by means of releasable locks 11.
  • carrier units 3 are components of belt grinding units 5 which - as shown in the drawing - are directly opposite one another, but also in the direction of travel of the plates to be ground can be staggered.
  • Each belt sanding unit 5 comprises a sanding belt 6 guided over a contact roller 7 and optionally over a pressure bar 8, wherein in the exemplary embodiment shown the counter-pressure roller required in each case is also formed by a contact roller wrapped by a sanding belt, or by a contact roller and a pressure bar.
  • tensioning rollers are preferably pivoted axially in short time intervals, so that lateral belt control is ensured.
  • a plurality of spacers 4 are provided on both sides of the plate path, each of these spacers 4 being assigned a load element 10.
  • At least the load elements 10 on the machine input side and on the machine output side are designed in the form of double-acting cylinder-piston units and at the same time serve as a lifting device for lifting the upper housing part 1 relative to the lower housing part 2.
  • the spacers 4 are infinitely adjustable and consist of a screw spindle 13, the actuator, e.g. Handwheel, not shown in the drawing, and a fixed stop 12.
  • the screw spindle 13 is guided in a threaded block provided on the lower housing part 2 and engages in a support sleeve 12 attached to the upper housing part 1.
  • the load elements designed as cylinder-piston units can be pressurized pneumatically or hydraulically with preselectable pressures, so that a simple pressure control a lifting, lowering and tensioning of the upper housing part 1 with respect to the lower housing part 2 with the interposition of the precisely adjustable spacers can be carried out. Due to the adjustment accuracy of the spacers 4 and the mutual clamping of the upper and lower housing parts, which can be predetermined over the machine length, not only a rough adjustment of the grinding gap, but even the required fine adjustment of the grinding gap can be achieved via the spacers 4 and the load elements 10, so that additional fine adjustment means can be achieved the belt grinding units 5 can be omitted.
  • a significant advantage of the interaction of precisely adjustable spacers and pneumatically or hydraulically actuated cylinder-piston units for axially loading the spacers is that the clamping force exerted by the cylinder-piston units can be selected depending on the respective operating conditions and that it is also possible to Eliminate the risk of damage to the sanding belt units from sudden fluctuations in the thickness of the plates to be sanded by immediately lowering the fluid pressure when such large thickness fluctuations occur, thereby enabling the belt sanding units 5 to move vertically.
  • the stopping of the belt grinder can also be controlled as a function of the pressure increase in the fluid feed system. Since the pressure rise in the fluid feed system resulting from an impermissible thickness deviation is already noticed before the disturbing thickness deviation reaches the first belt grinding unit, it is ensured that even a brief overload of the belt grinding units is avoided and any risk of damage can thus be eliminated.

Abstract

A belt grinding machine is described for the grinding of chipboard, fibreboard, faced board for similar boards in which the upper part of the housing can be raised and lowered relative to the lower part of the housing by a lifting device for adaptation to different board thicknesses. Spaced apart distance pieces or spacers are provided between the two parts of the housing to enable the basic board thickness to be selected. In order to ensure that boards of widely varying thicknesses can be machined with a grinding accuracy which meets the highest requirements, even when the boards that are supplied have relatively large thickness variations, a vertically steplessly adjustable clamping element, which is acted on by a pressure fluid, is associated with each spacer. In the lowered state of the upper part of the housing the clamping device clamps the upper part to the lower part with the spacers being trapped therebetween. The pressure of the pressure fluid supplied to the clamping devices is adjustable.

Description

Die Erfindung betrifft eine Bandschleifmaschine zum Bearbeiten von Span-, Faser-, Furnier- oder dergleichen -platten mit einem oberen und einem unteren Gehäuseteil, zwischen denen die zu schleifenden Platten hindurchführbar sind, wobei der obere Gehäuseteil zur Anpassung an unterschiedliche Plattendicken durch eine Hubvorrichtung anhebbar und auf jeweils zu beiden Längsseiten der Bandschleifmaschine zwischen dem oberen und unteren Gehäuseteil angeordnete, voneinander beabstandete Abstandshalter für die Dicken-Grundeinstellung absetzbar ist, und mit wenigstens einer in den Gehäuseteilen untergebrachten Bandschleifeinheit, bei der das Schleifband über eine Kontaktwalze und/oder einen entsprechenden Druckbalken geführt ist und eine ihr bzw. ihm gegenüberliegende und das Werkstück gegen sie bzw. ihn andrückende Gegendruckwalze oder eine weitere, der Kontaktwalze mit Schleifband gegenüberliegende und ein Schleifband führende Kontaktwalze vorgesehen ist.The invention relates to a belt grinding machine for processing chipboard, fiber, veneer or the like - plates with an upper and a lower housing part, between which the plates to be ground can be passed, the upper housing part can be raised by a lifting device to adapt to different plate thicknesses and can be placed on both longitudinal sides of the belt grinding machine between the upper and lower housing part, spaced apart spacers for the basic thickness setting, and with at least one belt grinding unit housed in the housing parts, in which the grinding belt via a contact roller and / or a corresponding pressure beam is guided and a counter pressure roller opposite her or him and pressing the workpiece against him or him or a further contact roller opposite the contact roller with grinding belt and guiding a grinding belt is provided.

Eine Bandschleifmaschine dieser Art ist aus der DE-PS 1 677 135 bekannt. Um zu verhindern, daß durch Schwingungen der Bandschleifeinheit die lichte Weite des Schleifspaltes verändert wird, ist bei dieser bekannten Bandschleifmaschine ein Kraftspeicher vorgesehen, der die Gegendruckwalze ständig in Richtung auf das jeweilige Andruckelement und damit auf das Schleifband drückt. Dadurch wird sichergestellt, daß auch beim Auf-und Abschwingen des Schleifbandes Unregelmäßigkeiten in der Oberflächenbearbeitung vermieden und selbst dann, wenn solche Schwingungen auftreten, eine konstante und genaue Bearbeitungstiefe erzielt wird.A belt grinder of this type is known from DE-PS 1 677 135. In order to prevent the clear width of the grinding gap from being changed by vibrations of the belt grinding unit, a force accumulator is provided in this known belt grinding machine which constantly presses the counter-pressure roller in the direction of the respective pressure element and thus onto the grinding belt. This ensures that irregularities in the surface treatment are avoided even when the grinding belt swings up and down and that a constant and precise machining depth is achieved even when such vibrations occur.

Aus der DE-PS 30 41 377 ist eine Bandschleifmaschine mit wenigstens einer Bandschleifeinheit bekannt, die eine das Schleifband führende Kontaktwalze und/oder einen entsprechenden Druckbalken aufweist und mit einer ihr bzw. ihm gegenüberliegenden und das Werkstück gegen sie bzw. ihn andrückenden Gegendruckwalze versehen ist, wobei der Gegendruckwalze auf der der Kontaktwalze bzw. dem Druckbalken abgewandten Seite mindestens eine Stützwalze zugeordnet ist, die mittels einer Kolben-Zylindereinheit an die Gegendruckwalze andrückbar ist. Dadurch wird erreicht, daß der Arbeitsspalt in seiner Höhe zwischen dem Kontaktelement und dem Gegendruckelement über seine gesamte Breite und unter den sich in der Praxis einstellenden wechselnden Belastungsverhältnissen stets parallel und damit konstant gehalten werden kann, da auf bestimmte Bereiche des Gegendruckelementes ein zusätzlicher und änderbarer Druck ausübbar ist.From DE-PS 30 41 377 a belt grinding machine with at least one belt grinding unit is known which has a contact roller guiding the grinding belt and / or a corresponding pressure beam and is provided with an opposing pressure roller opposite it and pressing the workpiece against it , wherein the counter-pressure roller on the side facing away from the contact roller or the pressure beam at least one backup roller is assigned, which can be pressed onto the counter-pressure roller by means of a piston-cylinder unit. This ensures that the height of the working gap between the contact element and the counter-pressure element can always be kept parallel and therefore constant over its entire width and under the changing load conditions that occur in practice, since additional and changeable pressure is exerted on certain areas of the counter-pressure element is exercisable.

Aufgabe der Erfindung ist es, eine Bandschleifmaschine der eingangs definierten Gattung in der Weise auszugestalten, daß sowohl bei schweren als auch bei mittelschweren und leichteren Rahmenkonstruktionen Platten stark unterschiedlicher Dicke mit einer höchsten Anforderungen entsprechenden Schleifgenauigkeit auch dann bearbeitet werden können, wenn die zugeführten Platten relativ große Dickenschwankungen aufweisen.The object of the invention is to design a belt grinding machine of the type defined at the outset in such a way that, in the case of heavy as well as medium-weight and lighter frame constructions, plates of widely differing thicknesses can be processed with a high level of grinding accuracy, even if the plates supplied are relatively large Show thickness fluctuations.

Gelöst wird diese Aufgabe nach der Erfindung dadurch, daß jedem Abstandshalter ein stufenlos höhenverstellbares, mit einem einstellbaren fluiden Druckmittel beaufschlagbares Belastungselement zugeordnet ist, das im abgesenkten Zustand des oberen Gehäuseteils gegen den Abstandshalter anpreßbar ist.This object is achieved according to the invention in that each spacer is assigned a continuously height-adjustable loading element which can be acted upon by an adjustable fluid pressure medium and which can be pressed against the spacer in the lowered state of the upper housing part.

Durch das Zusammenwirken von Abstandshaltern und mit fluidem Druckmittel beaufschlagbarten Belastungselementen wird zwischen unterem Gehäuseteil und oberem Gehäuseteil bei allen erforderlichen Spaltbreiten eine kraftschlüssige Verbindung geschaffen, die sicherstellt, daß der jeweils eingestellte Schleifspalt über die Durchlauflänge der Maschine konstant und genau ist und mit entsprechender Genauigkeit einfach und schnell auf neue Werte eingestellt werden kann.Due to the interaction of spacers and loading elements loaded with fluid pressure medium, a non-positive connection is created between the lower housing part and the upper housing part with all required gap widths, which ensures that the respectively adjusted grinding gap is constant and precise over the length of the machine and with corresponding accuracy simple and can be quickly set to new values.

Besonders vorteilhaft ist es, die Abstandshalter stufenlos verstellbar auszubilden, da es dann durch das Zusammenwirken dieser stufenlos verstellbaren Abstandshalter mit den mit fluidem Druckmittel beaufschlagbaren Belastungselementen möglich ist, den jeweiligen Schleifspalt so genau einzustellen, daß die bei herkömmlichen Bandschleifmaschinen erforderlichen Einrichtungen zur Feineinstellung der jeweiligen Kontaktwalzen nicht mehr benötigt werden.It is particularly advantageous to design the spacers to be infinitely adjustable, since it is then possible, through the interaction of these infinitely adjustable spacers, with the load elements that can be acted upon with fluid pressure medium set the grinding gap so precisely that the facilities required for conventional belt grinding machines for fine adjustment of the respective contact rollers are no longer required.

Zumindest ein Teil der Belastungselemente ist vorteilhafterweise in Form einer doppelt beaufschlagbaren Zylinder-Kolbeneinheit ausgebildet, so daß diese Belastungselemente eine Doppelfunktion dergestalt übernehmen können, daß sie einerseits ihre eigentliche Funktion, nämlich die axiale Verspannung der Abstandselemente zwischen Gehäuseunterteil und Gehäuseoberteil erfüllen und andererseits dazu verwendet werden können, das Gehäuseoberteil relativ zum Gehäuseunterteil anzuheben, um die Bandschleifmaschine zu öffnen bzw. durch Anheben des Gehäuseoberteils die Einstellung des jeweils gewünschten Schleifspaltes zu ermöglichen.At least some of the loading elements are advantageously designed in the form of a double-acting cylinder-piston unit, so that these loading elements can perform a double function in such a way that on the one hand they perform their actual function, namely the axial bracing of the spacing elements between the lower housing part and the upper housing part, and on the other hand they are used for this purpose can raise the upper housing part relative to the lower housing part to open the belt sander or to enable the adjustment of the desired grinding gap by lifting the upper housing part.

Belastungselement und zugehöriger Abstandshalter sind vorteihafterweise unmittelbar aneinandergrenzend angeordnet und über die Länge der Bandschleifmaschine so verteilt, daß ein verformungsfreies Verspannen von Gehäuseunterteil und Gehäuseoberteil sichergestellt ist.The loading element and the associated spacer are advantageously arranged directly adjacent to one another and distributed over the length of the belt grinding machine in such a way that a deformation-free bracing of the lower housing part and upper housing part is ensured.

Jeder Abstandshalter besteht gemäß einer vorteilhaften Ausgestaltung der Erfindung aus einer Schraubspindel mit zugehörigem Festanschlag, wobei insbesondere die von Hand oder über einen Stellmotor betätigbare Schraubspindel in einem an einem Gehäuseteil vorgesehenen Gewindeblock geführt ist und in eine am anderen Gehäuseteil befestigte Abstützhülse eingreift. Zwecks Erzielung einer stets exakt gleichen Einstellung der Abstandshalter sind diese über eine Betätigungseinrichtung gekuppelt und gemeinsam verstellbar, wobei zumindest einem Abstandshalter ein Positionsgeber zugeordnet sein kann, der stets exakte Informationen über die jeweils durch die Abstandshalter vorgegebene lichte Weite des Schleifspaltes liefert.According to an advantageous embodiment of the invention, each spacer consists of a screw spindle with an associated fixed stop, the screw spindle, which can be actuated by hand or via an actuator, being guided in a threaded block provided on one housing part and engaging in a support sleeve fastened to the other housing part. In order to ensure that the spacers are always set exactly the same, they are coupled via an actuating device and jointly adjustable, whereby at least one spacer can be assigned a position transmitter which always provides exact information about the clear width of the grinding gap, which is predetermined by the spacers.

Von besonderem Vorteil ist eine Ausführungsvariante der Erfindung, gemäß der die Belastungselemente über ein Fluiddrucksystem beaufschlagbar sind, das eine Druckbegrenzungseinrichtung aufweist. Durch die Verwendung einer derartigen Druckbegrenzungseinrichtung, die beispielsweise aus zumindest einem Uberdruckventil bestehen kann, wird sichergestellt, daß bei einer bezogen auf die vorgegebene Sollstärke der jeweiligen Platte zu starken Dickenabweichung die Druckbegrenzungseinrichtung anspricht und den Spanndruck der Belastungselemente schlagartig erniedrigt, so daß auf diese Weise Beschädigungsgefahren für die Schleifbandeinheiten beseitigt werden.Of particular advantage is an embodiment variant of the invention, according to which the loading elements can be acted upon via a fluid pressure system which has a pressure limiting device. The use of such a pressure limiting device, which can consist, for example, of at least one pressure relief valve, ensures that the pressure limiting device responds in the event of a thickness deviation that is too great in relation to the specified target thickness of the respective plate and suddenly reduces the clamping pressure of the loading elements, so that there is a risk of damage for the sanding belt units.

Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung sind Abstandshalter und Belastungselemente als integrale Einheit ausgebildet, wobei vorzugsweise der stufenlos verstellbare Teil des Abstandshaltersaus einer mit dem Zylinder der Zylinder-Kolbeneinheit verschraubten Stützhülse besteht, die mit einem den Kolben der Zylinder-Kolbeneinheit umgebenden Festanschlag an dem dem Zylinder der Zylinder-Kolbeneinheit gegenüberliegenden Gehäuseteil zusammenwirkt. Dieser Kompaktaufbau vereinfacht die Montage und erleichtert es, die Abstandshalter- und Belastungseinheit innerhalb der Maschine an den jeweils optimalen Positionen anzuordnen.According to a further advantageous embodiment of the invention, spacers and load elements are designed as an integral unit, the preferably continuously adjustable part of the spacer preferably consisting of a support sleeve screwed to the cylinder of the cylinder-piston unit, which with a fixed stop surrounding the piston of the cylinder-piston unit on the Cylinder of the cylinder-piston unit cooperating opposite housing part. This compact design simplifies assembly and makes it easier to arrange the spacer and load unit within the machine at the optimal positions.

Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels unter Bezugnahme auf die Zeichnung erläutert. Die einzige Figur der Zeichnung zeigt eine schematische Seitenansicht einer Ausführungsform der erfindungsgemäßen Bandschleifmaschine.The invention is explained below using an exemplary embodiment with reference to the drawing. The single figure of the drawing shows a schematic side view of an embodiment of the belt grinder according to the invention.

Die Bandschleifmaschine umfaßt ein oberes Gehäuseteil 1 und ein unteres Gehäuseteil 2, in denen einander gegenüberliegend Trägereinheiten 3 mittels lösbarer Verriegelungen 11 gehaltert sind. Diese Trägereinheiten 3 sind Bestandteile von Bandschleifeinheiten 5, die - wie in der Zeichnung dargestellt - einander unmittelbar gegenüberliegen, aber auch in Durchlaufrichtung der zu schleifenden Platten gegeneinander versetzt angeordnet sein können.The belt grinder comprises an upper housing part 1 and a lower housing part 2, in which carrier units 3 are held opposite one another by means of releasable locks 11. These carrier units 3 are components of belt grinding units 5 which - as shown in the drawing - are directly opposite one another, but also in the direction of travel of the plates to be ground can be staggered.

Jede Bandschleifeinheit 5 umfaßt ein über eine Kontaktwalze 7 sowie gegebenenfalls über einen Druckbalken 8 geführtes Schleifband 6, wobei im gezeigten Ausführungsbeispiel die jeweils erforderliche Gegendruckwalze ebenfalls von einer von einem Schleifband umschlungenen Kontaktwalze, bzw. von einer Kontaktwalze und einem Druckbalken gebildet ist.Each belt sanding unit 5 comprises a sanding belt 6 guided over a contact roller 7 and optionally over a pressure bar 8, wherein in the exemplary embodiment shown the counter-pressure roller required in each case is also formed by a contact roller wrapped by a sanding belt, or by a contact roller and a pressure bar.

Mittels eines oszillationszylinders 9 werden vorzugsweise Spannrollen in kurzen Zeitintervallen axial verschwenkt, so daß eine seitliche Bandsteuerung gewährleistet ist.By means of an oscillating cylinder 9, tensioning rollers are preferably pivoted axially in short time intervals, so that lateral belt control is ensured.

Zwischen unterem Gehäuseteil 2 und oberem Gehäuseteil 1 sind beiderseits der Plattendurchlaufbahn mehrere Abstandshalter 4 vorgesehen, wobei jedem dieser Abstandshalter 4 ein Belastungs- element 10 zugeordnet ist.Between the lower housing part 2 and the upper housing part 1, a plurality of spacers 4 are provided on both sides of the plate path, each of these spacers 4 being assigned a load element 10.

Zumindest die maschineneingangsseitig und maschinenausgangsseitig gelegenen Belastungselemente 10 sind in Form doppelt beaufschlagbarer Zylinder-Kolben-Einheiten ausgebildet und dienen gleichzeitig als Hubeinrichtung zum Anheben des Gehäuseoberteils 1 relativ zum Gehäuseunterteil 2.At least the load elements 10 on the machine input side and on the machine output side are designed in the form of double-acting cylinder-piston units and at the same time serve as a lifting device for lifting the upper housing part 1 relative to the lower housing part 2.

Die Abstandshalter 4 sind stufenlos verstellbar und bestehen aus einer Schraubspindel 13, deren Betätigungsorgan, z.B. Handrad, in der Zeichnung nicht dargestellt ist, sowie einem Festanschlag 12. Die Schraubspindel 13 ist in einem am unteren Gehäuseteil 2 vorgesehenen Gewindeblock geführt und greift in eine am oberen Gehäuseteil 1 befestigte Abstützhülse 12 ein.The spacers 4 are infinitely adjustable and consist of a screw spindle 13, the actuator, e.g. Handwheel, not shown in the drawing, and a fixed stop 12. The screw spindle 13 is guided in a threaded block provided on the lower housing part 2 and engages in a support sleeve 12 attached to the upper housing part 1.

Die als Zylinder-Kolbeneinheiten ausgebildeten Belastungselemente sind pneumatisch oder hydraulisch mit vorgebbaren Drücken beaufschlagbar, so daß durch eine einfache Drucksteuerung ein Anheben, Absenken und Verspannen des Gehäuseoberteils 1 bezüglich des Gehäuseunterteils 2 unter Zwischenschaltung der exakt einstellbaren Abstandshalter durchführbar ist. Aufgrund der Verstellgenauigkeit der Abstandshalter 4 und der über die Maschinenlänge definiert vorgebbaren gegenseitigen Verspannung von Gehäuseoberteil und Gehäuseunterteil läßt sich nicht nur eine Schleifspalt-Grobeinstellung, sondern sogar die erforderliche Schleifspalt-Feineinstellung über die Abstandshalter 4 und die Belastungselemente 10 erreichen, so daß zusätzliche Feineinstellungsmittel in den Bandschleifeinheiten 5 entfallen können.The load elements designed as cylinder-piston units can be pressurized pneumatically or hydraulically with preselectable pressures, so that a simple pressure control a lifting, lowering and tensioning of the upper housing part 1 with respect to the lower housing part 2 with the interposition of the precisely adjustable spacers can be carried out. Due to the adjustment accuracy of the spacers 4 and the mutual clamping of the upper and lower housing parts, which can be predetermined over the machine length, not only a rough adjustment of the grinding gap, but even the required fine adjustment of the grinding gap can be achieved via the spacers 4 and the load elements 10, so that additional fine adjustment means can be achieved the belt grinding units 5 can be omitted.

Ein wesentlicher Vorteil des Zusammenwirkens von exakt einstellbaren Abstandshaltern und pneumatisch oder hydraulisch beaufschlagten Zylinder-Kolbeneinheiten zur axialen Belastung der Abstandshalter besteht darin, daß die durch die Zylinder-Kolbeneinheiten ausgeübte Spannkraft in Abhängigkeit von den jeweiligen Betriebsbedingungen gewählt werden kann und daß es außerdem möglich ist, von plötzlichen Dickenschwankungen der zu schleifenden Platten herrührende Beschädigungsgefahren für die Schleifbandeinheiten dadurch auszuschalten, daß bei Auftreten solch starker Dickenschwankungen der Fluiddruck sofort erniedrigt wird, wodurch es den Bandschleifeinheiten 5 ermöglicht wird, in Vertikalrichtung auszuweichen. In einem solchen Falle kann auch das Stillsetzen der Bandschleifmaschine in Abhängigkeit von dem Druckanstieg im Fluid-Speisesystem gesteuert werden. Da der von einer unzulässigen Dickenabweichung herrührende Druckanstieg im Fluid-Speisesystem bereits bemerkt wird bevor die störende Dickenabweichung in die erste Bandschleifeinheit gelangt, ist sichergestellt, daß auch eine kurzzeitige Überbelastung von Bandschleifeinheiten vermieden und damit jegliche Beschädigungsgefahr ausgeschaltet werden kann.A significant advantage of the interaction of precisely adjustable spacers and pneumatically or hydraulically actuated cylinder-piston units for axially loading the spacers is that the clamping force exerted by the cylinder-piston units can be selected depending on the respective operating conditions and that it is also possible to Eliminate the risk of damage to the sanding belt units from sudden fluctuations in the thickness of the plates to be sanded by immediately lowering the fluid pressure when such large thickness fluctuations occur, thereby enabling the belt sanding units 5 to move vertically. In such a case, the stopping of the belt grinder can also be controlled as a function of the pressure increase in the fluid feed system. Since the pressure rise in the fluid feed system resulting from an impermissible thickness deviation is already noticed before the disturbing thickness deviation reaches the first belt grinding unit, it is ensured that even a brief overload of the belt grinding units is avoided and any risk of damage can thus be eliminated.

Im Zusammenhang damit ist von Bedeutung, daß nach dem Ausweichen des Maschinenteiles in vertikaler Richtung, z.B. bei Überlastung, eine Rückstellung des Maschinenteiles auf die ursprünglich gewählte Dicken- und Grundeinstellung möglich ist, ohne diese Grundeinstellung korrigieren zu müssen. Dies erbringt Vorteile beim Plattenschleifen in üblichen Großserien.In connection with this, it is important that after the machine part has deflected in the vertical direction, e.g. in the event of an overload, the machine part can be reset to the originally selected thickness and basic setting without having to correct this basic setting. This offers advantages when grinding plates in standard large series.

Claims (15)

1. Bandschleifmaschine zum Bearbeiten von Span-, Faser-, Furnier- oder dergleichen -platten mit einem oberen und einem unteren Gehäuseteil, zwischen denen die zu schleifenden Platten hindurchgeführt sind, wobei der obere Gehäuseteil zur Anpassung an unterschiedliche Plattendicken durch eine hydraulische Hubvorrichtung anhebbar und auf jeweils zu beiden Längsseiten der Bandschleifmaschine zwischen dem oberen und unteren Gehäuseteil angeordnete, voneinander beabstandete Abstandshalter für die Dicken-Grundeinstellung absetzbar ist, und mit wenigstens einer in den Gehäuseteilen untergebrachten Bandschleifeinheit, bei der das Schleifband über eine Kontaktwalze und/oder einen entsprechenden Druckbalken geführt ist und eine ihr bzw. ihm gegenüberliegende und das Werkstück gegen sie bzw. ihn andrückende Gegendruckwalze oder eine weitere, der Kontaktwalze mit Schleifband gegenüberliegende und ein Schleifband führende Kontaktwalze vorgesehen ist, dadurch gekennzeichnet , daß jedem Abstandshalter (4) ein stufenlos höhenverstellbares, mit einem einstellbaren fluiden Druckmittel beaufschlagbares und mit dem oberen und unteren Gehäuseteil (1,2) verbundenes Belastungselement (10) zugeordnet ist, das den jeweiligen Abstandshalter (4) mit dem abgesenkten oberen Gehäuseteil (1) und dem unteren Gehäuseteil (2) verspannt.1. Belt grinder for processing chipboard, fiber, veneer or the like - plates with an upper and a lower housing part, between which the plates to be ground are passed, the upper housing part can be lifted by a hydraulic lifting device and adapted to different plate thicknesses on both longitudinal sides of the belt grinder between the upper and lower housing part, spaced spacers for the basic thickness setting can be placed, and with at least one belt grinding unit accommodated in the housing parts, in which the sanding belt is guided over a contact roller and / or a corresponding pressure beam is and a counter pressure roller opposite her or him and pressing the workpiece against him or him or a further contact roller opposite the contact roller with abrasive belt and guiding an abrasive belt is provided, characterized in that each spacer (4) a continuously height-adjustable loadable with an adjustable fluid pressure medium and connected to the upper and lower housing part (1, 2) is associated with the load element (10), the respective spacer (4) with the lowered upper housing part (1) and the clamped lower housing part (2). 2. Bandschleifmaschine nach Anspruch 1, dadurch gekennzeichnet , daß zumindest ein Teil der Belastungselemente (10) in Form einer doppelt beaufschlagbaren Zylinder-Kolbeneinheit ausgebildet ist.2. Belt grinding machine according to claim 1, characterized in that at least part of the loading elements (10) is designed in the form of a double-acting cylinder-piston unit. 3. Bandschleifmaschine nach Anspruch 2, dadurch gekennzeichnet , daß zumindest die maschineneingangs- und maschinenausgangsseitig angeordneten Belastungselemente (10) als doppelt beaufschlagbare Zylinder-Kolbeneinheiten ausgeführt sind und gleichzeitig die Hubvorrichtung für das obere Gehäuseteil (1) bilden.3. Belt grinding machine according to claim 2, characterized in that at least the machine input and machine output side arranged load elements (10) are designed as double-acting cylinder-piston units and at the same time form the lifting device for the upper housing part (1). 4. Bandschleifmaschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß jedes Belastungselement (10) unmittelbar angrenzend an den zugehörigen Abstandshalter (4) angeordnet ist.4. Belt grinder according to one or more of the preceding claims, characterized in that each loading element (10) is arranged immediately adjacent to the associated spacer (4). 5. Bandschleifmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet , daß die Abstandshalter (4) stufenlos verstellbar ausgebildet sind.5. Belt grinder according to one of the preceding claims, characterized in that the spacers (4) are designed to be infinitely adjustable. 6. Bandschleifmaschine nach Anspruch 5, dadurch gekennzeichnet , daß jeder Abstandshalter (4) aus einer Schraubspindel (13) mit zugehörigem Festanschlag (12) besteht.6. Belt grinding machine according to claim 5, characterized in that each spacer (4) consists of a screw spindle (13) with an associated fixed stop (12). 7. Bandschleifmaschine nach Anspruch 6, dadurch gekennzeichnet , daß die von Hand oder über einen Stellmotor betätigbare Schraubspindel (13) in einem an einem Gehäuseteil (2) vorgesehenen Gewindeblock geführt ist und in eine am anderen Gehäuseteil (1) befestigte Abstützhülse (12) eingreift.7. Belt grinding machine according to claim 6, characterized in that the screw spindle (13), which can be actuated by hand or via an actuator, is guided in a threaded block provided on a housing part (2) and engages in a support sleeve (12) fastened to the other housing part (1) . 8. Bandschleifmaschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet , daß die Abstandshalter (4) über eine Betätigungseinrichtung gekoppelt und gemeinsam verstellbar sind.8. Belt grinder according to one or more of the preceding claims, characterized in that the spacers (4) are coupled via an actuating device and are jointly adjustable. 9. Bandschleifmaschine nach Anspruch 8, dadurch gekennzeichnet , daß zumindest einem Abstandshalter (4) ein Positionsgeber zugeordnet ist.9. Belt grinder according to claim 8, characterized in that at least one spacer (4) is assigned a position transmitter. 10. Bandschleifmaschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet , daß die Belastungselemente (10) durch ein Fluiddrucksystem beaufschlagbar sind, das eine Druckbegrenzungseinrichtung aufweist.10. Belt grinder according to one or more of the preceding claims, characterized in that the loading elements (10) can be acted upon by a fluid pressure system which has a pressure limiting device. 11. Bandschleifmaschine nach Anspruch 10, dadurch gekennzeichnet , daß zumindest einem der Belastungselemente (10) ein'bei einem regelbaren Überdruck ansprechendes Ventil zugeordnet ist.11. Belt grinding machine according to claim 10, characterized in that at least one of the loading elements (10) is assigned a valve which responds at a controllable excess pressure. 12. Bandschleifmaschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß Abstandshalter (4) und Belastungselement (10) als integrale Einheit ausgebildet sind.12. Belt grinding machine according to one or more of the preceding claims, characterized in that spacers (4) and loading element (10) are formed as an integral unit. 13. Bandschleifmaschine nach Anspruch 12, dadurch gekennzeichnet , daß der stufenlos verstellbare Teil des Abstandshalters (4) aus einer mit dem Zylinder der Zylinder-Kolbeneinheit (10) verschraubten Stützhülse besteht, die mit einem den Kolben der Zylinder-Kolbeneinheit umgebenden Festanschlag an einem der Gehäuseteile(1, 2) zusammenwirkt.13. Belt grinder according to claim 12, characterized in that the continuously adjustable part of the spacer (4) consists of a with the cylinder of the cylinder-piston unit (10) screwed support sleeve which with a fixed stop surrounding the piston of the cylinder-piston unit cooperates on one of the housing parts (1, 2). 14. Bandschleifmaschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet , daß die zusammenwirkenden Abstandshalter (4) und Belastungselemente (10) gleichzeitig eine Einrichtung zur Grobeinstellung und zur Feineinstellung des Schleifspaltes bilden.14. Belt grinding machine according to one or more of the preceding claims, characterized in that the interacting spacers (4) and loading elements (10) simultaneously form a device for coarse adjustment and fine adjustment of the grinding gap. 15. Bandschleifmaschine nach Anspruch 10 oder 11, dadurch gekennzeichnet , daß zumindest ein Teil der Bandschleifeinheiten (5) in Abhängigkeit von einem Druckanstieg im Fluid-Speisesystem stillsetzbar ist.15. Belt grinding machine according to claim 10 or 11, characterized in that at least some of the belt grinding units (5) can be stopped as a function of a pressure increase in the fluid feed system.
EP84104749A 1983-05-03 1984-04-27 Belt sanding machine Expired EP0127760B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84104749T ATE32573T1 (en) 1983-05-03 1984-04-27 BELT GRINDING MACHINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3316154A DE3316154C2 (en) 1983-05-03 1983-05-03 Belt grinder
DE3316154 1983-05-03

Publications (2)

Publication Number Publication Date
EP0127760A1 true EP0127760A1 (en) 1984-12-12
EP0127760B1 EP0127760B1 (en) 1988-02-24

Family

ID=6198049

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84104749A Expired EP0127760B1 (en) 1983-05-03 1984-04-27 Belt sanding machine

Country Status (4)

Country Link
US (1) US4546572A (en)
EP (1) EP0127760B1 (en)
AT (1) ATE32573T1 (en)
DE (2) DE3316154C2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4414958C1 (en) * 1994-04-28 1995-11-02 Baehre & Greten Belt grinder for board material
DE19915909A1 (en) * 1998-12-11 2000-06-21 Steinemann Ag St Gallen Process for controlling the grinding process and computer control for wide grinding machine
EP2213414A3 (en) * 2009-02-02 2013-04-10 Steinemann Technology AG Wide-wheel grinding machine
CN108972254A (en) * 2018-07-25 2018-12-11 周佩龙 A kind of metal surface derusting rust-proofing processing unit
EP4321297A1 (en) * 2022-08-08 2024-02-14 SCM Group S.p.A. Panel machining machine

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8707974U1 (en) * 1987-06-04 1987-08-13 Weber, Georg, 8640 Kronach, De
DE4028740C2 (en) * 1990-09-10 2003-04-10 Kvaerner Panel Sys Gmbh Centering device for belt grinding machines
FR2673563B1 (en) * 1991-03-08 1993-06-11 Skid Sa APPARATUS FOR SANDING SKIS.
US5399307A (en) * 1993-06-18 1995-03-21 Dalton; Robert E. Methods of compression molding two or more polytetrafluoroethylene resin layers
JP3073769U (en) * 2000-06-02 2000-12-08 株式会社ジェイ・ボックス Coin cleaning and polishing equipment
US6769958B1 (en) * 2002-08-21 2004-08-03 Howard W. Grivna Material removal monitor
US6913512B2 (en) * 2002-08-21 2005-07-05 Howard W. Grivna Material removal monitor
US9108293B2 (en) * 2012-07-30 2015-08-18 Rohm And Haas Electronic Materials Cmp Holdings, Inc. Method for chemical mechanical polishing layer pretexturing
CN104249285A (en) * 2013-06-25 2014-12-31 苏州意玛斯砂光设备有限公司 Sanding machine with inclined precision-polishing sanding head
CN104249291A (en) * 2013-06-25 2014-12-31 苏州意玛斯砂光设备有限公司 High-precision lifting mechanism for sanding machine
CN106180895A (en) * 2016-07-07 2016-12-07 重庆明友钢具制造有限公司 Hands is saw blade sawtooth processing technique
CN106002526B (en) * 2016-07-07 2018-08-24 重庆明友钢具制造有限公司 A kind of two-sided deburring and polishing all-in-one machine
CN111761385B (en) * 2020-08-06 2021-07-20 广东技术师范大学 Automatic aluminum-plastic plate machining device and machining method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1815858A1 (en) * 1967-12-29 1969-07-10 Steinemann Ulrich Ag Belt grinding machine for grinding plate-shaped workpieces
DE2031717A1 (en) * 1969-09-25 1971-04-15 Timesavers Sanders, Ine , Mmneapo lis, Minn (VStA) Belt grinder
DE7430601U (en) * 1974-12-12 Bison Werke Baehre Und Greten Gmbh & Co Kg Wide belt sander for panels, in particular wooden panels
DE2549323A1 (en) * 1975-11-04 1977-05-05 Wehner Maschf Broad band polishing machine - has position of band adjustable to accurately control workpiece thickness
DE2315389B2 (en) * 1973-03-28 1980-10-09 Karl M. Reich, Maschinenfabrik Gmbh, 7440 Nuertingen Machine for processing plate-shaped workpieces made of wood or the like
DE3041377C2 (en) * 1980-11-03 1982-12-30 Bison-Werke Bähre & Greten GmbH & Co KG, 3257 Springe Wide belt sander for processing chipboard, fiber, veneer or the like. plates

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2463750A (en) * 1946-04-12 1949-03-08 George M Curtin Grinding apparatus
US2895263A (en) * 1955-10-26 1959-07-21 Seiberling Rubber Co Method and apparatus for buffing shoe soles
US3169352A (en) * 1961-06-26 1965-02-16 Smithway Sales Corp Panel sanding machine
US3269065A (en) * 1963-12-23 1966-08-30 Charles R Tidland Sanding apparatus
US3859760A (en) * 1972-12-21 1975-01-14 Paul E Grieb Control system for grinding machine
US3895464A (en) * 1974-04-22 1975-07-22 Timesavers Inc Lumber dressing and dimensioning machine
US3991522A (en) * 1975-05-05 1976-11-16 Aladdin Manufacturing Company Apparatus for sharpening rotary blades
US4248019A (en) * 1977-11-28 1981-02-03 Western Gear Corporation Workpiece conditioning grinder control system
US4178721A (en) * 1977-12-28 1979-12-18 Kimwood Corporation Apparatus for sizing and finishing batches of lumber
US4322919A (en) * 1980-06-27 1982-04-06 Acrometal Products, Inc. Self-centering feed mechanism for an abrasive grinding machine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7430601U (en) * 1974-12-12 Bison Werke Baehre Und Greten Gmbh & Co Kg Wide belt sander for panels, in particular wooden panels
DE1815858A1 (en) * 1967-12-29 1969-07-10 Steinemann Ulrich Ag Belt grinding machine for grinding plate-shaped workpieces
DE2031717A1 (en) * 1969-09-25 1971-04-15 Timesavers Sanders, Ine , Mmneapo lis, Minn (VStA) Belt grinder
DE2315389B2 (en) * 1973-03-28 1980-10-09 Karl M. Reich, Maschinenfabrik Gmbh, 7440 Nuertingen Machine for processing plate-shaped workpieces made of wood or the like
DE2549323A1 (en) * 1975-11-04 1977-05-05 Wehner Maschf Broad band polishing machine - has position of band adjustable to accurately control workpiece thickness
DE3041377C2 (en) * 1980-11-03 1982-12-30 Bison-Werke Bähre & Greten GmbH & Co KG, 3257 Springe Wide belt sander for processing chipboard, fiber, veneer or the like. plates

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4414958C1 (en) * 1994-04-28 1995-11-02 Baehre & Greten Belt grinder for board material
DE19915909A1 (en) * 1998-12-11 2000-06-21 Steinemann Ag St Gallen Process for controlling the grinding process and computer control for wide grinding machine
DE19915909C2 (en) * 1998-12-11 2003-05-28 Steinemann Technology Ag St Ga Process for controlling the grinding process and computer control for wide grinding machine
EP2213414A3 (en) * 2009-02-02 2013-04-10 Steinemann Technology AG Wide-wheel grinding machine
CN108972254A (en) * 2018-07-25 2018-12-11 周佩龙 A kind of metal surface derusting rust-proofing processing unit
EP4321297A1 (en) * 2022-08-08 2024-02-14 SCM Group S.p.A. Panel machining machine

Also Published As

Publication number Publication date
DE3469415D1 (en) 1988-03-31
DE3316154C2 (en) 1986-06-19
DE3316154A1 (en) 1984-11-08
EP0127760B1 (en) 1988-02-24
US4546572A (en) 1985-10-15
ATE32573T1 (en) 1988-03-15

Similar Documents

Publication Publication Date Title
EP0127760B1 (en) Belt sanding machine
DE10043557B4 (en) Slide inclination correcting device in a pressing machine
DE2115217A1 (en) Bearing for machine parts that can be moved on double slide guides with slide plates exposed to pressure medium and one or more pressure sensors that control the application pressure
EP0124802A2 (en) Machines for working several sides of a work piece simultaneously
DE4028740C2 (en) Centering device for belt grinding machines
DE1910879C3 (en) Straightening machine for elongated workpieces with a round cross-section
DE3015874A1 (en) BELT GRINDING MACHINE
DE3041377C2 (en) Wide belt sander for processing chipboard, fiber, veneer or the like. plates
DE2038232C3 (en) Workpiece clamping table for heavy workpieces, especially on horizontal drilling and milling machines
DE3245124A1 (en) Damping device for a machine tool slide
DD256612A3 (en) PRINT BAR FOR SLIP GRINDING MACHINE
DE1752346A1 (en) Crowning device for press brakes
DE8313080U1 (en) BELT GRINDING MACHINE
DE3835010C2 (en)
DE1286379B (en) Slab milling machine
DE2635473A1 (en) Belt sander for wood - has individually adjustable cylinders mounted on pressure beam to set height of abrasive belt
AT405034B (en) METHOD FOR AUTOMATIC POLISHING OF FLAT EDGES ON PANELS OF MARBLE, NATURAL STONE, GRANITE OR THE LIKE. AND AUTOMATIC POLISHING MACHINE FOR CARRYING OUT THIS PROCESS
DE8524876U1 (en) Device for applying pressure to a press for preparing tools
DE2851384C2 (en)
DE2440688B2 (en) Device for controlling the compressive force exerted on a continuous web in the gap between two interacting rollers
DE2533153A1 (en) Clamping arrgmt. for hydraulically driven shears - uses two beams to cut rod and sheet material during same stroke
DE102006053420C5 (en) belt sander
DE641584C (en) Device for sanding the edges of stove tiles
DE4116746A1 (en) Surface preparation rig for flat workpieces e.g. wooden veneer - has slider supports for grinding belt, individually adjustable via servo cylinders
DE2221243C2 (en) Machine tool vertically movable carriage - has annular guide element contg. sealing ring surrounding pressureless oil chamber

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19850522

17Q First examination report despatched

Effective date: 19860829

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO MILANO S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI NL SE

REF Corresponds to:

Ref document number: 32573

Country of ref document: AT

Date of ref document: 19880315

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3469415

Country of ref document: DE

Date of ref document: 19880331

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19890420

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19890424

Year of fee payment: 6

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19890430

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19890717

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19891101

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19900427

Ref country code: AT

Effective date: 19900427

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19900428

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19900430

Ref country code: CH

Effective date: 19900430

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19910419

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19910502

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19910611

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19920430

BERE Be: lapsed

Owner name: BISON-WERKE BAHRE & GRETEN G.M.B.H. & CO. K.G.

Effective date: 19920430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19921230

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19930101

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 84104749.1

Effective date: 19910115