EP0293574A2 - Belt grinding machine - Google Patents

Belt grinding machine Download PDF

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Publication number
EP0293574A2
EP0293574A2 EP88105417A EP88105417A EP0293574A2 EP 0293574 A2 EP0293574 A2 EP 0293574A2 EP 88105417 A EP88105417 A EP 88105417A EP 88105417 A EP88105417 A EP 88105417A EP 0293574 A2 EP0293574 A2 EP 0293574A2
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EP
European Patent Office
Prior art keywords
grinding
belt
transport path
feed direction
workpiece
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Granted
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EP88105417A
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German (de)
French (fr)
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EP0293574A3 (en
EP0293574B1 (en
Inventor
Georg Weber
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Individual
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Individual
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Priority to AT88105417T priority Critical patent/ATE67954T1/en
Publication of EP0293574A2 publication Critical patent/EP0293574A2/en
Publication of EP0293574A3 publication Critical patent/EP0293574A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • 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

Definitions

  • the innovation relates to a belt grinding machine for grinding flat workpieces on their underside in a continuous process, comprising a transport path with a plurality of lower and upper rollers which form a transport gap between the workpiece and at least some of which can be driven, and two below the transport path Grinding units arranged one behind the other in the feed direction, each with a grinding belt that can be pressed onto the underside of a workpiece running through the transport path.
  • Certain processing operations on flat plate-shaped objects mean that these objects have to be ground on their underside after the processing operation and before their further use. For example, during stamping and plasma cutting of sheet metal, burrs are created along the cutting lines, which have to be ground down before further processing of the sheet metal. When they leave the processing machine the flat workpieces are to pass through a grinding machine immediately thereafter, this presupposes that the workpieces can be held, transported and supported during the grinding process. For this purpose, a minimum length of the workpiece - measured in the direction of transport - is required in order to grasp the workpiece in front of or behind the grinding point and thus be able to transport it.
  • the innovation is based on the object of specifying a grinding machine of the type mentioned at the beginning, with which workpieces can also be ground on their underside which have a very short length in the transport direction.
  • this object is achieved in that the grinding units are arranged offset from one another transversely to the feed direction in such a way that their grinding tracks - measured from the two side edges of the transport track - each extend over approximately half the width thereof, and - viewed in the feed direction - in addition to the respective grinding unit, at least one lower roller cooperating with an upper roller is arranged.
  • first half of the workpiece is ground, the workpiece being held and transported during this grinding process by the upper roller lying next to the grinding unit and interacting with it.
  • This makes it possible to grind workpieces whose dimensions in the direction of transport can be less than the length of the grinding zone measured in the same direction.
  • the dimension of the workpiece only has to be so large that the workpiece is practically always gripped by two pairs of rollers which follow one another in the transport direction and thereby maintains its flat position. The same process is then repeated for the other half of the workpiece.
  • the upper roller which interacts with the lower roller lying next to the grinding unit, extends over the entire width of the transport path.
  • the upper rollers of the transport path are mounted so as to be adjustable in height.
  • the rollers can be mounted together on a height-adjustable frame.
  • a pair of upper and lower rollers extending across the entire width of the transport path are provided in front of, behind and between the grinding units is.
  • the belt grinding machine shown schematically in FIGS. 1 and 2 comprises a frame or housing, generally designated 10, which has a workpiece inlet opening 12 and a workpiece outlet opening 14, which are connected to one another by a conveyor path for the workpiece, generally designated 16.
  • Each of the sanding units comprises an endless sanding belt 22 which runs over an upper deflection roller 24, a lower deflection roller 26 and a contact roller 28, the horizontal axes of which are each directed perpendicular to the feed direction A.
  • the contact roller 28 is driven by an electric motor 30, the drive wheel 32 of which drives an intermediate wheel 36 via a first belt drive 34, which in turn drives the contact roller 28 via a second belt drive 38.
  • the upper deflection roller 24 and the contact roller 28 are arranged such that the abrasive belt section 40 running between them lies in a horizontal plane.
  • the width of the grinding belt 18 and the axial length of the rollers 24, 26 and the contact roller 28 can be chosen so that the grinding paths of the two grinding units, starting from the lateral edges of the transport path 16, overlap slightly in the middle.
  • the transport path 16 comprises - viewed in the direction of travel A - in front of, between and behind the grinding units 18 and 20 in each case a roller 42 which extends over the entire width of the transport path 16 and whose axes are parallel to the axes of the deflecting rollers 24, 26 and the contact rollers 28 are. Axially next to the two grinding units 18 and 20 there is also a lower roller 44, which extends only approximately over half the width of the transport path 16. The bearings of the lower rollers 42 and 44 are not shown in the figures for the sake of clarity.
  • Each of the lower rollers 42, 44 is assigned an upper roller 46 which extends over the entire width of the transport path 16 and which, with the respective lower roller 42 or 44, has a nip for conveying a flat workpiece forms.
  • the upper rollers 46 are mounted together on a frame 48 which in turn is mounted on the frame 10 in an adjustable manner. The height adjustment takes place with the aid of threaded spindles 50 which engage in corresponding threaded bores on the frame 48 and which are each connected via a gear 52 to a shaft 54 which in turn is driven by an electric motor 56 when the height of the frame 48 is adjusted should.
  • the upper rollers 46 are driven by an electric motor 58, which drives a first upper roller 46 via a belt or chain drive 60, from which the further upper rollers 46 are then driven via further belt or chain drives 60.
  • a drive of the lower rollers 42 is not absolutely necessary, but can also be provided.
  • a workpiece entering the belt grinding machine through the inlet opening 12 is first only ground on one half by the grinding unit 18, the grinding belt being able to be pressed against the underside of the workpiece by a pressure bar 62 which, for example, can be designed in this way can, as described in EP-A2-0 210 654.
  • the workpiece is held and transported by the roller 44 lying next to the grinding unit 18 and the upper roller 46 assigned to it.
  • the second half of the workpiece is then ground by the grinding unit 20, the workpiece on the other side now being held and transported by the lower roller 44 lying next to the grinding unit 20 and the upper roller 46 assigned to it.

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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)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

In a belt grinding machine for grinding plane workpieces on their underside in a continuous operation, comprising a transport path with a plurality of bottom and top rollers (42, 44; 46), which form between them a transport gap for the workpiece and of which at least one part can be driven, and two grinding units (18, 20) arranged one behind the other below the transport path in feed direction (A) and having one grinding belt (22) each which can be pressed against the underside of a workpiece running through the transport path, the grinding units (18, 20) are arranged so as to offset relative to one another transversely to the feed direction (A) in such a way that their grinding paths - measured from the two lateral margins of the transport path - in each case extend over about half the width of the same, in which arrangement - as viewed in feed direction (A) - at least one bottom roller (44) interacting with a top roller (46) is arranged next to the respective grinding unit (18, 20). <IMAGE>

Description

Die Neuerung betrifft eine Bandschleifmaschine zum Schlieifen von flächigen Werkstücken an ihrer Unterseite im Durchlauf­verfahren, umfassend eine Transportbahn mit einer Mehrzahl von unteren und oberen Rollen die zwischen sich einen Trans­portspalt für das Werkstück bilden und von denen mindestens ein Teil antreibbar ist, und zwei unterhalb der Transport­bahn in Vorschubrichtung hintereinander angeordnete Schleif­aggregate mit je einem an die Unterseite eines durch die Transportbahn laufenden Werkstückes andrückbaren Schleifband.The innovation relates to a belt grinding machine for grinding flat workpieces on their underside in a continuous process, comprising a transport path with a plurality of lower and upper rollers which form a transport gap between the workpiece and at least some of which can be driven, and two below the transport path Grinding units arranged one behind the other in the feed direction, each with a grinding belt that can be pressed onto the underside of a workpiece running through the transport path.

Bestimmte Bearbeitungsvorgänge an flächigen plattenförmi­gen Gegenständen führen dazu, daß diese Gegenstände nach dem Bearbeitungsvorgang und vor ihrer weiteren Verwendung an ihrer Unterseite geschliffen werden müssen. So entste­hen beispielsweise beim Stanzen ebenso wie beim Plasma­schneiden von Blechen entlang der Schnittlinien Grate, die vor der weiteren Verarbeitung der Bleche abgeschliffen werden müssen. Wenn die die Bearbeitungsmaschine verlassen­ den flächigen Werkstücke unmittelbar anschließend durch eine Schleifmaschine hindurchlaufen sollen, setzt dies voraus, daß die Werkstücke während des Schleifvorganges gehalten, transportiert und abgestützt werden können. Hierzu ist eine Mindestlänge des Werkstückes - in Transportrich­tung gemessen - erforderlich, um das Werkstück vor oder hinter der Schleifstelle erfassen und damit transportieren zu können. Das Halten der Werkstücke mit Hilfe von Saug­hebern scheidet in vielen Fällen aufgrund des hohen Gewich­tes der Werkstücke und der hohen Zerspankräfte aus. Das gleiche gilt für Magnete, sofern die Werkstücke nicht ohnehin aus einem nichtmagnetisierbaren Material bestehen.Certain processing operations on flat plate-shaped objects mean that these objects have to be ground on their underside after the processing operation and before their further use. For example, during stamping and plasma cutting of sheet metal, burrs are created along the cutting lines, which have to be ground down before further processing of the sheet metal. When they leave the processing machine the flat workpieces are to pass through a grinding machine immediately thereafter, this presupposes that the workpieces can be held, transported and supported during the grinding process. For this purpose, a minimum length of the workpiece - measured in the direction of transport - is required in order to grasp the workpiece in front of or behind the grinding point and thus be able to transport it. Holding the workpieces with the aid of suction lifters is ruled out in many cases due to the high weight of the workpieces and the high cutting forces. The same applies to magnets, unless the workpieces are made of a non-magnetizable material anyway.

Ist ein Schleifen des Werkstückes von unten her aus den vorstehendend genannten Gründen nicht möglich, müßte es gewendet werden, um es von oben her schleifen zu können. Ein Wenden von Hand scheidet häufig wegen des großen Ge­wichtes der Teile aus. Ein Wenden mit Hilfe geeigneter Maschinen setzt eine gleichbleibende Form und Größe der Werkstücke voraus. Ein wesentlicher Vorzug des Brennschnei­dens von Metallplatten oder Blechen besteht aber gerade darin, daß Werkstücke unterschiedlicher Form und Größe in beliebiger Reihenfolge hergestellt werden können.If the workpiece cannot be ground from below for the reasons mentioned above, it would have to be turned so that it can be ground from above. Manual turning is often ruled out because of the great weight of the parts. Turning with the help of suitable machines requires a constant shape and size of the workpieces. A major advantage of flame cutting metal plates or sheets is precisely that workpieces of different shapes and sizes can be produced in any order.

Der Neuerung liegt die Aufgabe zugrunde, eine Schleifma­schine der eingangs genannten Art anzugeben, mit der auch solche Werkstücke an ihrer Unterseite im Durchlaufverfahren geschliffen werden können, die in Transportrichtung eine sehr geringe Länge aufweisen.The innovation is based on the object of specifying a grinding machine of the type mentioned at the beginning, with which workpieces can also be ground on their underside which have a very short length in the transport direction.

Diese Aufgabe wird neuerungsgemäß dadurch gelöst, daß die Schleifaggregate quer zur Vorschubrichtung gegenein­ander versetzt derart angeordnet sind, daß sich ihre Schleifbahnen - gemessen von den beiden Seitenrändern der Transportbahn aus - jeweils über ca. die halbe Breite der­selben erstrecken, und daß - in Vorschubrichtung betrach­tet - neben dem jeweiligen Schleifaggregat mindestens eine mit einer oberen Rolle zusammenwirkende untere Rolle ange­ordnet ist.According to the innovation, this object is achieved in that the grinding units are arranged offset from one another transversely to the feed direction in such a way that their grinding tracks - measured from the two side edges of the transport track - each extend over approximately half the width thereof, and - viewed in the feed direction - in addition to the respective grinding unit, at least one lower roller cooperating with an upper roller is arranged.

Bei der neuerungsgemäßen Lösung wird also zunächst die eine Hälfte des Werkstückes geschliffen, wobei während dieses Schleifvorganges das Werkstück von der neben dem schleifenden Schleifaggregat liegenden und der mit dieser zusammenwirkenden oberen Rolle gehalten und transportiert wird. Dadurch ist es möglich, Werkstücke zu schleifen, deren Abmessung in Transportrichtung geringer sein kann, als die in der gleichen Richtung gemessene Länge der Schleif­zone. Die Abmessung des Werkstückes muß nur so groß sein, daß das Werkstück praktisch immer von zwei in Transport­richtung aufeinanderfolgenden Rollenpaaren erfaßt wird und dadurch seine ebene Lage beibehält. Der gleiche Vorgang wiederholt sich dann für die andere Hälfte des Werkstückes.In the solution according to the invention, therefore, first half of the workpiece is ground, the workpiece being held and transported during this grinding process by the upper roller lying next to the grinding unit and interacting with it. This makes it possible to grind workpieces whose dimensions in the direction of transport can be less than the length of the grinding zone measured in the same direction. The dimension of the workpiece only has to be so large that the workpiece is practically always gripped by two pairs of rollers which follow one another in the transport direction and thereby maintains its flat position. The same process is then repeated for the other half of the workpiece.

Um auszuschließen, daß zwischen den beiden Schleifbahnen ein Grat stehenbleibt, ist es zweckmäßig, die beiden Schleif­aggregate so auszubilden und anzuordnen, daß sich die Schleifbahnen der beiden Schleifaggregate quer zur Vorschub­richtung geringfügig überlappen.In order to rule out that a burr remains between the two grinding tracks, it is expedient to design and arrange the two grinding devices so that the grinding tracks of the two grinding devices overlap slightly transversely to the feed direction.

Um auch bei dünneren Werkstücken eine gute Abstützung des Werkstückes während des Schleifvorganges zu gewährleisten, ist es zweckmäßig, wenn die obere Rolle, die mit der neben dem Schleifaggregat liegenden unteren Rolle zusammenwirkt, sich über die gesamte Breite der Transportbahn erstreckt.In order to ensure good support of the workpiece during the grinding process even with thinner workpieces, it is expedient if the upper roller, which interacts with the lower roller lying next to the grinding unit, extends over the entire width of the transport path.

Um eine Einstellung der Bandschleifmaschine auf verschiede­ne Werkstückdicken zu ermöglichen, ist es zweckmäßig, wenn die oberen Rollen der Transportbahn höhenverstellbar gela­gert sind. Hierzu können die Rollen gemeinsam an einem höhenverstellbaren Rahmen gelagert sein.In order to enable the belt grinding machine to be adjusted to different workpiece thicknesses, it is expedient if the upper rollers of the transport path are mounted so as to be adjustable in height. For this purpose, the rollers can be mounted together on a height-adjustable frame.

Um eine gute Führung des Werkstückes beim Durchlauf durch die Bandschleifmaschine zu gewähr!eisten, ist es vorteil­haft, wenn - in Transportrichtung betrachtet - vor, hinter und zwischen den Schleifaggregaten jeweils ein Paar von sich über die gesamte Breite der Transportbahn erstrecken­den oberen und unteren Rollen vorgesehen ist.In order to ensure good guidance of the workpiece as it passes through the belt grinding machine, it is advantageous if, viewed in the direction of transport, a pair of upper and lower rollers extending across the entire width of the transport path are provided in front of, behind and between the grinding units is.

Weitere Vorteile und Werkmale der Neuerung ergeben sich aus der folgenden Beschreibung, welche in Verbindung mit den beigefügten Zeichnungen die Neuerung anhand eines Ausführungsbeispieles erläutert. Es zeigen:

  • Fig. 1 eine schematische Seitenschnittansicht der erfindungsgemäßen Bandschleifmaschine und
  • Fig. 2 einen schematischen Schnitt längs Linie II-II in Figur 1.
Further advantages and features of the innovation result from the following description, which explains the innovation using an exemplary embodiment in conjunction with the accompanying drawings. Show it:
  • Fig. 1 is a schematic side sectional view of the belt sander according to the invention and
  • 2 shows a schematic section along line II-II in FIG. 1.

Die in den Figuren 1 und 2 schematisch wiedergegebene Band­schleifmaschine umfaßt ein allgemein mit 10 bezeichnetes Gestell oder Gehäuse, das eine Werkstückeintrittsöffnung 12 und eine Werkstückaustrittsöffnung 14 aufweist, die durch eine allgemein mit 16 bezeichnete Transportbahn für das Werkstück miteinander verbunden sind.The belt grinding machine shown schematically in FIGS. 1 and 2 comprises a frame or housing, generally designated 10, which has a workpiece inlet opening 12 and a workpiece outlet opening 14, which are connected to one another by a conveyor path for the workpiece, generally designated 16.

Jedes der Schleifaggregate umfaßt ein endloses Schleifband 22, das über eine obere Umlenkrolle 24, eine untere Umlenk­rolle 26 und eine Kontaktwalze 28 läuft, deren horizontale Achsen jeweils senkrecht zur Vorschubrichtung A gerichtet sind. Die Kontaktwalze 28 wird von einem Elektromotor 30 her angetrieben, dessen Antriebsrad 32 über einen ersten Riementrieb 34 ein Zwischenrad 36 antreibt, das seinerseits über einen zweiten Riementrieb 38 die Kontaktwalze 28 an­treibt. Die obere Umlenkrolle 24 und die Kontaktwalze 28 sind so angeordnet, daß der zwischen ihnen verlaufende Schleifbandabschnitt 40 in einer horizontalen Ebene liegt. Die Breite des Schleifbandes 18 und die axiale Länge der Rollen 24, 26 und der Kontaktwalze 28 können so gewählt sein, daß sich die Schleifbahnen der beiden Schleifaggre­gate ausgehend von den seitlichen Rändern der Transport­bahn 16 in der Mitte geringfügig überlappen.Each of the sanding units comprises an endless sanding belt 22 which runs over an upper deflection roller 24, a lower deflection roller 26 and a contact roller 28, the horizontal axes of which are each directed perpendicular to the feed direction A. The contact roller 28 is driven by an electric motor 30, the drive wheel 32 of which drives an intermediate wheel 36 via a first belt drive 34, which in turn drives the contact roller 28 via a second belt drive 38. The upper deflection roller 24 and the contact roller 28 are arranged such that the abrasive belt section 40 running between them lies in a horizontal plane. The width of the grinding belt 18 and the axial length of the rollers 24, 26 and the contact roller 28 can be chosen so that the grinding paths of the two grinding units, starting from the lateral edges of the transport path 16, overlap slightly in the middle.

Die Transportbahn 16 umfaßt - in Durchlaufrichtung A be­trachtet - vor, zwischen und hinter den Schleifaggregaten 18 und 20 jeweils eine sich über die gesamte Breite der Transportbahn 16 erstreckende Rolle 42, deren Achsen parallel zu den Achsen der Umlenkrollen 24, 26 und der Kontaktwalzen 28 gerichtet sind. Axial neben den beiden Schleifaggregaten 18 und 20 ist ferner jeweils eine untere Rolle 44 angeordnet, die sich nur annähernd über die halbe Breite der Transportbahn 16 erstreckt. Die Lager der unte­ren Rollen 42 und 44 sind aus Gründen der größeren Klar­heit in den Figuren nicht dargestellt. Jeder der unteren Rollen 42, 44 ist eine obere Rolle 46 zugeordnet, die sich über die gesamte Breite der Transportbahn 16 erstreckt und die mit der jeweiligen unteren Rolle 42 bzw. 44 einen Walzenspalt zur Förderung eines flächigen Werkstückes bildet. Die oberen Rollen 46 sind gemeinsam an einem Rahmen 48 gelagert, der seinerseits höhenverstellbar an dem Gestell 10 gelagert ist. Die Höhenverstellung erfolgt mit Hilfe von Gewindespindeln 50, die in entsprechende Gewindebohrungen am Rahmen 48 eingreifen und die jeweils über ein Getriebe 52 mit einer Welle 54 verbunden sind, die ihrerseits von einem Elektromotor 56 her angetrieben wird, wenn der Rahmen 48 in seiner Höhe verstellt werden soll. Die oberen Rollen 46 werden von einem Elektromotor 58 her angetrieben, der über einen Riemen- oder Kettentrieb 60 eine erste obere Rolle 46 antreibt, von der aus dann über weitere Riemen- oder Kettentriebe 60 die weiteren oberen Rollen 46 angetrieben werden. Ein Antrieb der unteren Rollen 42 ist nicht unbedingt erforderlich, kann jedoch ebenfalls vorgesehen sein.The transport path 16 comprises - viewed in the direction of travel A - in front of, between and behind the grinding units 18 and 20 in each case a roller 42 which extends over the entire width of the transport path 16 and whose axes are parallel to the axes of the deflecting rollers 24, 26 and the contact rollers 28 are. Axially next to the two grinding units 18 and 20 there is also a lower roller 44, which extends only approximately over half the width of the transport path 16. The bearings of the lower rollers 42 and 44 are not shown in the figures for the sake of clarity. Each of the lower rollers 42, 44 is assigned an upper roller 46 which extends over the entire width of the transport path 16 and which, with the respective lower roller 42 or 44, has a nip for conveying a flat workpiece forms. The upper rollers 46 are mounted together on a frame 48 which in turn is mounted on the frame 10 in an adjustable manner. The height adjustment takes place with the aid of threaded spindles 50 which engage in corresponding threaded bores on the frame 48 and which are each connected via a gear 52 to a shaft 54 which in turn is driven by an electric motor 56 when the height of the frame 48 is adjusted should. The upper rollers 46 are driven by an electric motor 58, which drives a first upper roller 46 via a belt or chain drive 60, from which the further upper rollers 46 are then driven via further belt or chain drives 60. A drive of the lower rollers 42 is not absolutely necessary, but can also be provided.

Aus der vorstehenden Beschreibung ergibt sich, daß ein durch die Eintrittsöffnung 12 in die Bandschleifmaschine einlaufendes Werkstück zunächst nur auf einer Hälfte von dem Schleifaggregat 18 geschliffen wird, wobei das Schleifband an die Unterseite des Werkstückes durch einen Druckbalken 62 andrückbar ist, der beispielsweise so ausgebildet sein kann, wie dies in der EP-A2-0 210 654 beschrieben ist. Während des Schleifvorganges wird das Werkstück dabei von der neben dem Schleifaggregat 18 liegenden Rolle 44 und der ihr zugeordneten oberen Rolle 46 gehalten und transpor­tiert. Anschließend wird die zweite Hälfte des Werkstückes von dem Schleifaggregat 20 geschliffen, wobei nun das Werk­stück auf der anderen Seite von der neben dem Schleifaggre­gat 20 liegenden unteren Rolle 44 und der ihr zugeordneten oberen Rolle 46 gehalten und transportiert wird. Dadurch ist es möglich, auch Werkstücke abzustützen und zu trans­portieren, deren Ausdehnung in Durchlaufrichtung A so gering ist, daß die Werkstücke während des Schleifvorganges nicht von den vor und/oder hinter dem jeweiligen Schieif­aggregat liegenden Rollenpaaren erfaßt werden können.From the above description it follows that a workpiece entering the belt grinding machine through the inlet opening 12 is first only ground on one half by the grinding unit 18, the grinding belt being able to be pressed against the underside of the workpiece by a pressure bar 62 which, for example, can be designed in this way can, as described in EP-A2-0 210 654. During the grinding process, the workpiece is held and transported by the roller 44 lying next to the grinding unit 18 and the upper roller 46 assigned to it. The second half of the workpiece is then ground by the grinding unit 20, the workpiece on the other side now being held and transported by the lower roller 44 lying next to the grinding unit 20 and the upper roller 46 assigned to it. This makes it possible to support and transport workpieces whose expansion in the direction of travel A is so small that the workpieces cannot be caught by the pairs of rollers lying in front and / or behind the respective grinding unit during the grinding process.

Claims (6)

1. Bandschleifmaschine zum Schleifen von flächigen Werk­stücken an ihrer Unterseite im Durchlaufverfahren, um­fassend eine Transportbahn (16) mit einer Mehrzahl von unteren und oberen Rollen (42, 44; 46), die zwischen sich einen Transportspalt für das Werkstück bilden und von denen mindestens ein Teil antreibbar ist, und zwei unterhalb der Transportbahn (16) in Vorschubrichtung (A) hintereinander angeordnete Schleifaggregate (18, 20) mit je einem an die Unterseite eines durch die Trans­portbahn (16) laufenden Werkstückes andrückbaren Schleif­band (22), dadurch gekennzeichnet, daß die Schleifaggregate (18, 20) quer zur Vorschubrichtung (A) gegeneinander versetzt derart angeordnet sind, daß sich ihre Schleifbahnen - gemessen von den beiden Sei­tenrändern der Transportbahn (16) aus - jeweils über ca. die halbe Breite derselben erstrecken, und daß - in Vorschubrichtung (A) betrachtet - neben dem jeweiligen Schleifaggregat (18, 20) mindestens eine mit einer oberen Rolle (46) zusammenwirkende untere Rolle (44) an­geordnet ist.1. Belt grinding machine for grinding flat workpieces on their underside in a continuous process, comprising a transport path (16) with a plurality of lower and upper rollers (42, 44; 46), which form a transport gap between the workpiece and at least one of them Part can be driven, and two grinding units (18, 20) arranged one behind the other in the feed direction (A) in the feed direction (A), each with a grinding belt (22) that can be pressed onto the underside of a workpiece running through the transport path (16), characterized in that the grinding units (18, 20) are arranged offset from one another transversely to the feed direction (A) in such a way that their grinding tracks - measured from the two side edges of the transport track (16) - each extend over approximately half the width thereof, and that - in Feed direction (A) considered - in addition to the respective grinding unit (18, 20) at least one cooperating with an upper roller (46) ere roller (44) is arranged. 2. Bandschleifmaschine nach Anspruch 1, dadurch gekennzeichnet, daß die obere Rolle (46), die mit der neben dem Schleifaggregat (18, 20) liegen­den unteren Rolle (44) zusammenwirkt, sich über die gesamte Breite der Transportbahn (16) erstreckt.2. Belt grinding machine according to claim 1, characterized in that the upper roller (46), which cooperates with the next to the grinding unit (18, 20) lying lower roller (44), extends over the entire width of the transport path (16). 3. Bandschleifmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß sich die Schleifbah­nen der beiden Schleifaggregate (18, 20) quer zur Vor­schubrichtung geringfügig überlappen.3. Belt grinding machine according to claim 1 or 2, characterized in that the grinding tracks of the two grinding units (18, 20) overlap slightly transversely to the feed direction. 4. Bandschleifmaschine nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die oberen Rollen (46) der Transportbahn (16) höhenverstellbar gelagert sind.4. Belt grinder according to one of claims 1 to 3, characterized in that the upper rollers (46) of the transport path (16) are mounted adjustable in height. 5. Bandschleifmaschine nach Anspruch 4, dadurch gekennzeichnet, daß die oberen Rollen (46) gemeinsam an einem höhenverstellbaren Rahmen (48) ge­lagert sind.5. Belt grinder according to claim 4, characterized in that the upper rollers (46) are mounted together on a height-adjustable frame (48). 6. Bandschleifmaschine nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß in Vorschub­richtung (A) betrachtet vor, hinter und zwischen den Schleifaggregaten (18, 20) jeweils ein Paar von sich über die gesamte Breite der Transportbahn (16) erstrek­kenden oberen und unteren Rollen (42, 46) angeordnet ist.6. Belt grinder according to one of claims 1 to 5, characterized in that viewed in the feed direction (A) in front of, behind and between the grinding units (18, 20) each have a pair of upper and extending over the entire width of the transport path (16) lower rollers (42, 46) is arranged.
EP88105417A 1987-06-04 1988-04-05 Belt grinding machine Expired - Lifetime EP0293574B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88105417T ATE67954T1 (en) 1987-06-04 1988-04-05 BELT GRINDING MACHINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8707974U DE8707974U1 (en) 1987-06-04 1987-06-04 Belt sander
DE8707974U 1987-06-04

Publications (3)

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EP0293574A2 true EP0293574A2 (en) 1988-12-07
EP0293574A3 EP0293574A3 (en) 1989-02-22
EP0293574B1 EP0293574B1 (en) 1991-10-02

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EP88105417A Expired - Lifetime EP0293574B1 (en) 1987-06-04 1988-04-05 Belt grinding machine

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EP (1) EP0293574B1 (en)
AT (1) ATE67954T1 (en)
DE (2) DE8707974U1 (en)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
WO2000035628A1 (en) * 1998-12-11 2000-06-22 Steinemann Ag Grinding process control method and computer-aided control for wide grinding machines

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Publication number Priority date Publication date Assignee Title
DE8903949U1 (en) * 1989-03-31 1990-08-02 Weber, Georg, 8640 Kronach Belt sander
DE19621690A1 (en) * 1996-05-30 1997-12-04 Jun Alexander Faller Brick abrasion device for manufacture of flat bricks
DE29609533U1 (en) * 1996-05-30 1996-12-12 Faller jun., Alexander, Dipl.-Wirtsch.-Ing. (FH), 84061 Ergoldsbach Face brick belt grinding machine
CN107052956B (en) * 2017-01-23 2023-02-28 张必葵 Arc lock face double-sided polishing machine
CN112296821A (en) * 2020-10-23 2021-02-02 李丹丹 Abrasive belt type wire drawing processing device for plastic product surface machining

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US2338644A (en) * 1940-12-30 1944-01-04 Leota T Pallas Plate polishing machine
DE1577495A1 (en) * 1966-06-07 1970-01-08 Tidland Machine Company Belt grinder and method of operating the same
US3991522A (en) * 1975-05-05 1976-11-16 Aladdin Manufacturing Company Apparatus for sharpening rotary blades

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DE3316154C2 (en) * 1983-05-03 1986-06-19 Bison-Werke Bähre & Greten GmbH & Co KG, 3257 Springe Belt grinder

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Publication number Priority date Publication date Assignee Title
US2338644A (en) * 1940-12-30 1944-01-04 Leota T Pallas Plate polishing machine
DE1577495A1 (en) * 1966-06-07 1970-01-08 Tidland Machine Company Belt grinder and method of operating the same
US3991522A (en) * 1975-05-05 1976-11-16 Aladdin Manufacturing Company Apparatus for sharpening rotary blades

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000035628A1 (en) * 1998-12-11 2000-06-22 Steinemann Ag Grinding process control method and computer-aided control for wide grinding machines

Also Published As

Publication number Publication date
DE8707974U1 (en) 1987-08-13
ATE67954T1 (en) 1991-10-15
EP0293574A3 (en) 1989-02-22
EP0293574B1 (en) 1991-10-02
DE3865241D1 (en) 1991-11-07

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