EP0033922B1 - Edge grinding machine for plate-shaped workpieces, particularly plates of glass or stone - Google Patents

Edge grinding machine for plate-shaped workpieces, particularly plates of glass or stone Download PDF

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Publication number
EP0033922B1
EP0033922B1 EP81100704A EP81100704A EP0033922B1 EP 0033922 B1 EP0033922 B1 EP 0033922B1 EP 81100704 A EP81100704 A EP 81100704A EP 81100704 A EP81100704 A EP 81100704A EP 0033922 B1 EP0033922 B1 EP 0033922B1
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EP
European Patent Office
Prior art keywords
grinding
workpiece
edge
grinding wheel
cantilever arm
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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
Application number
EP81100704A
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German (de)
French (fr)
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EP0033922A2 (en
EP0033922A3 (en
Inventor
Elmore Monari
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.)
Officina Meccanica Zanetti Aristodemo & C Sas
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Officina Meccanica Zanetti Aristodemo & C Sas
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Priority to AT81100704T priority Critical patent/ATE4872T1/en
Publication of EP0033922A2 publication Critical patent/EP0033922A2/en
Publication of EP0033922A3 publication Critical patent/EP0033922A3/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
    • B24B27/00—Other grinding machines or devices
    • B24B27/0084—Other grinding machines or devices the grinding wheel support being angularly adjustable
    • 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
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
    • B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
    • B24B9/10—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of plate glass

Definitions

  • the invention relates to an edge grinder for plate-shaped workpieces, in particular glass or stone slabs or the like, with a clamping device arranged on the upper end of a stand, in particular consisting of a plurality of horizontally oriented suction clamps, for the edge part lying in a horizontal position with, in particular, freely projecting edges , workpiece to be machined, a horizontally radially directed to the stand, around it in particular by a full 360 ° rotatable cantilever arm and with the help of a slide or the like.
  • the z. B. from DE-PS 1 181 584 known edge grinding machines of this type are used in particular for chamfering or chamfering the sharp edges of glass panes, glass or stone slabs, or the like.
  • the grinding unit is guided by rotating the horizontal cantilever arm around the workpiece clamped on the upper end of the stand and at the same time is held in engagement with the workpiece by constant contact of the guide roller against the peripheral surface of the workpiece and by displacement in the longitudinal direction of the cantilever arm.
  • the grinding wheel inclined with its lower head surface towards the workpiece plane is pressed from top to bottom against the respective upper peripheral edge of the workpiece, whereby it only engages with the workpiece edge with the lowest section of its inclined head surface.
  • the object of the invention is, in the case of the edge grinding machines of the type described at the outset, to set and readjust the inclined position of the grinding spindle relative to the workpiece on the one hand and the cutting edge. H. To allow grinding depth or the peripheral speed of the grinding wheel on the other hand.
  • this object is achieved in that the grinding unit with the aid of a first circular arc-shaped guide around a horizontal, parallel to the cantilever arm, i. H. radially to the workpiece pivot axis is pivotally and fixably attached to an intermediate holder, which with the aid of a second circular-arc guide around a horizontal, transverse to the cantilever arm d. H.
  • the swivel axis which is oriented tangentially to the workpiece, can be pivoted and locked on the slide, which can be moved in the longitudinal direction of the cantilever arm, the grinding wheel at the lower end of a vertical, driven by a hydraulic motor, fastened in the grinding unit by hand confirmation up and down, and the downward stroke of the grinding spindle at least one adjustable stop is limited.
  • the inclined position of the lower head surface of the grinding wheel with respect to the workpiece plane can be pivoted by pivoting the grinding unit with the aid of circular-arc guides around two mutually perpendicular, horizontal pivot axes, one of which is approximately radial to the workpiece and the other approximately tangential to the workpiece , precise and also very easy to set or readjust.
  • the drive of the grinding spindle with the aid of a hydraulic motor makes it possible to use the known, easy controllability of the hydraulic motors for the adjustment or readjustment of the rotational speed of the grinding spindle or the peripheral speed of the grinding wheel and the speeds mentioned to the respective properties of the workpiece or Adjust grinding wheel.
  • the adjustable stop to limit the downward stroke of the grinding spindle which can be moved up and down by hand, enables the cutting or grinding depth to be adjusted or adjusted and, at the same time, ensures uniform chamfering of the workpiece edges.
  • a particularly advantageous, preferred embodiment of the edge grinding machine according to the invention is characterized in that the grinding wheel is held at the lower end of the grinding spindle by means of a fastening screw which is coaxially pierced through the grinding spindle from above and the head of this fastening screw provided at the upper end of the grinding spindle is in the uppermost one End position of the grinding spindle comes into engagement with a suitable wrench that is freely rotatable in the grinding unit for turning the fastening screw when attaching and removing the grinding wheel.
  • the illustrated edge grinding machine is intended in particular for chamfering or chamfering the sharp edges of glass panes, glass plates, stone plates or the like. It consists of a stand A which has a clamping device at its upper end for the glass plate D lying in a horizontal position.
  • this clamping device consists of a plurality of suction clamps C directed upwards, some of which are provided directly on the upper end of the stand and some on horizontally pivotable arm B projecting therefrom.
  • the glass plate D lies on this in a horizontal plane suction clamps C and is held by suction.
  • the edge part of the clamped glass plate D with the edge D 'to be machined projecting laterally over the entire glass plate circumference is freely accessible both from above and from below.
  • a horizontal cantilever arm E directed radially to the stand A is rotatably mounted at least a full 360 ° around the stand A and carries one on the cantilever arm E from and to the stand A, i. H. from and to the glass plate D which is clamped thereon a slide or carriage F.
  • a grinding unit 1 is arranged on this slide or carriage F, which has a preferably pot-shaped, plate-shaped or ring-shaped grinding wheel M which overlaps the edge part of the glass plate D.
  • a counter pressure roller R2 is rotatably mounted on the slide M, which supports the glass plate D in the working area of the grinding wheel M.
  • the grinding unit 1 consists of a housing 2 which contains an approximately vertical grinding spindle 6 and the hydraulically actuated drive motor 10 (hereinafter referred to as hydraulic motor) which is axially parallel to the grinding spindle.
  • the grinding spindle 6 is rotatably supported by means of ball bearings (4) and a spacer sleeve 5 in an outer, coaxial spindle sleeve 3 and is driven by the hydraulic motor 10 via a flat belt 8, a pulley 9 fastened to the motor shaft and one on the upper end of the grinding spindle 6 attached pulley 7 driven.
  • the two pulleys 7, 9 are relatively wide, in particular designed as belt drums, in order to enable the grinding spindle 6 to move up and down relative to the housing 2 or the hydraulic motor 10 attached to it.
  • the spindle sleeve 3 is slidably guided up and down in the housing 2 of the grinding unit and can be moved with the aid of a hand lever 16.
  • the hand lever 16 is firmly seated on a shaft 15 to which a pair of mutually spring-loaded toothed sectors 14, 114 are connected in a rotationally fixed manner. These tooth sectors 14, 114 are in engagement with an outer, axially parallel toothing 103 of the spindle sleeve 3.
  • the spindle sleeve 3 can be fixed in the housing 2 with the aid of a radially directed clamping screw 27 with a lever handle.
  • the grinding wheel M is fastened to an overlying flange 11, which engages with an upper middle shoulder 111 in a centering hole provided in the head end in the lower end of the grinding spindle 6.
  • the grinding wheel M is fastened to the grinding spindle 6 with the aid of a screw 13 which is coaxially inserted from above through the grinding spindle 6 and screwed into a corresponding threaded hole in the central flange shoulder 111.
  • the polygonal head 113 of the fastening screw 13 projects from the upper head end of the grinding spindle 6 into a central recess in the associated pulley 7 and is freely accessible from above.
  • a tubular socket wrench 25 matching the polygonal head 113 of the fastening screw 13 is freely rotatably mounted in the upper end wall of the housing 2 and is rotated from the outside with the aid of a rotary knob 26, rotary handle or the like can be.
  • the tooth sectors 14, 114 and the toothing 103 With the help of the hand lever 16, the tooth sectors 14, 114 and the toothing 103, the spindle sleeve 3 with the grinding spindle 6 can be raised so far that the polygonal head 113 of the fastening screw 13 engages from below in the stationary, tubular socket wrench 25.
  • the downward stroke of the grinding spindle is consequently limited and adjustable depending on the given thickness of the glass plate D or depending on the desired width of the edge bevel.
  • a parallel to the grinding spindle 6 rod 18 is slidably mounted in the housing 2 of the grinding unit 1, which is led out of the housing 2 with its upper, thinner end 218.
  • the rod 18 has an axially parallel toothing 118, with which a gear 17 fastened on the shaft 15 of the hand lever 16 is in engagement.
  • the stop head 20 needs to be rotated and the stop screw 19 corresponding to the new plate thickness needs to be brought coaxially over the rod 18.
  • the width of the chamfer or the chamfer of the plate edge D ' can be adjusted or adjusted by rotating the individual stop screws 19.
  • the housing 2 of the grinding unit 1 is mounted with a lower circular wall section 28 on a corresponding, upper circular wall section 30 of an underlying, box-shaped intermediate holder 34 and can consequently be compared to the intermediate holder 34 by a through the center of curvature of the two wall sections 28, 30 approximately parallel to Longitudinal axis of the extension arm E extending pivot axis 29 can be pivoted to a limited extent.
  • the pivot axis 29 lies approximately in the lower head surface of the grinding wheel M and thereby intersects the axis of rotation of the grinding wheel M, as is shown in particular in FIG.
  • a threaded bolt 31 is fixed, which engages through an elongated hole 32 in the pivoting direction of the grinding unit 1 of the adjacent, lower, circular wall section 28 of the housing 2 and one inside through a housing 2 side opening 33 accessible screw nut carries.
  • this bolt 31 With the help of this bolt 31, the housing 2 of the grinding unit 1 can be fixed in its angular position set with respect to the intermediate holder 34.
  • the intermediate carrier 34 has a lateral, circular arc-shaped cheek 35 which bears against a corresponding, circular arc-shaped guide flange 36 which projects upwards from the carriage or carriage F.
  • the intermediate holder 34 together with the grinding unit 1, can be moved through the center of curvature of the cheek 35 and the guide flange 36 transversely to the longitudinal axis of the cantilever arm E d.
  • pivot axis 129 extending at right angles to the pivot axis 29 can be pivoted to a limited extent.
  • This pivot axis 129 also lies approximately in the lower head surface of the grinding wheel M and passes through the axis of rotation of the grinding wheel M, as can be seen in particular from FIG.
  • the circular arc-shaped cheek 35 of the intermediate holder 34 can be positively connected to the circular-arc-shaped guide flange 36 of the slide F and can be fixed on the guide flange 36 with the aid of a manually operated clamping or locking device 37.
  • the grinding unit 1 can be pivoted and adjusted about the two pivot axes 29 and 129, which run at right angles to one another, such that the lower, circular head surface of the grinding wheel M is opposite the desired or required the plane of the glass plate D assumes an inclined working position in which the grinding wheel M only engages with the beveled edge D 'of the glass plate D in the region of a limited section M' of its lower, circular head surface.
  • a guide roller R1 with a vertical axis is freely rotatable and adjustable in height.
  • the grinding unit 1 z. B. in the direction of the arrow Z2 in such a way around the glass plate D to be machined that the guide roller R1 continuously bears against the peripheral surface of the glass pane D.
  • the cantilever arm E is rotated around the stand A and the carriage F with the grinding unit 1 is moved on the cantilever arm E.
  • the grinding wheel M is pressed with the help of the hand lever 16 from above against the upper, sharp peripheral edge D 'of the glass plate D.
  • the direction of rotation of the grinding wheel M is indicated by the arrow direction Z1 in FIG.
  • the adjustable limitation of the downward stroke of the grinding wheel M ensures a uniformly wide bevel D "of the glass plate edge D '.
  • the working area M' of the grinding wheel M is supplied with cooling or rinsing liquid with the aid of a tube 38 passed through the tubular or annular guide roller R1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Abstract

1. An edge grinding machine for plate-shaped workpieces, particularly plates of glass or stone or the like, comprising a gripping means for gripping the workpiece which is to be machined and which is disposed in a horizontal position with in particular edge portions thereof projecting freely on all sides, said gripping means being disposed on the upper end of a support (A) and comprising in particular a plurality of horizontally disposed suction grippers (C), a cantilever arm which is disposed horizontally radially with respect to the support (A) and which is rotatable around the support in particular through a full 360 degrees, and a grinding unit (1) which is guided displaceably by means of a carriage or the like on the cantilever arm, from and towards the workpiece, and which comprises a grinding wheel (M) which in particular is of a cup-shaped, annular or plate-shaped configuration and which is somewhat inclined with its underneath head surface relative to the plane of the workpiece and which can be pressed against the edge of the workpiece from above, a counter-pressure roller (R2) which is arranged in the region of the grinding wheel on the underside of the workpiece, a guide roller which bears laterally against the peripheral surface of the workpiece, and a drive motor for the grinding wheel, characterised in that the grinding unit (1) is secured to an intermediate holder (34) in such a way as to be pivotal and lockable about a horizontal pivot axis (29) extending parallel to the cantilever arm (E), that is to say, radially with respect to the workpiece (D), by means of a first arcuate guide (28, 30), which intermediate holder (34) is mounted on the carriage (F) which is displaceable in the longitudinal direction of the cantilever arm (E), in such a way as to be pivotal and lockable about a horizontal pivot axis (129) directed transversely with respect to the cantilever arm (E), that is to say, tangentially with respect to the workpiece (D), by means of a second arcuate guide (35, 36), wherein the grinding wheel (M) is secured to the lower end of a vertical grinding spindle (6) which is drivable by a hydraulic motor (10) and which is displaceable upwardly and downwardly in the grinding unit (1) by manual actuating means (16), and the downward stroke movement of the grinding spindle (6) is restricted by at least one adjustable abutment (19).

Description

Die Erfindung betrifft eine Kantenschleifmaschine für plattenförmige Werkstücke, insbesondere Glas- oder Steinplatten od. dgl., mit einer auf dem oberen Ende eines Ständers angeordneten, insbesondere aus mehreren, waagerecht ausgerichteten Saugspannern bestehenden Spannvorrichtung für das in waagerechter Stellung mit insbesondere allseitig frei vorspringenden Randteilen liegende, zu bearbeitende Werkstück, einem waagerecht radial zum Ständer gerichteten, um diesen herum insbesondere um volle 360° drehbaren Auslegerarm und einem mit Hilfe eines Schlittens od. dgl. auf dem Auslegerarm vom und zum Werkstück verschiebbar geführten Schleifaggregat, das eine insbesondere topf-, ringoder tellerförmige, mit ihrer unteren Kopffläche zur Werkstückebene etwas geneigte, von oben gegen die Werkstückkante andrückbare Schleifscheibe, eine im Bereich der Schleifscheibe auf der unteren Werkstückseite angeordnete Gegendruckrolle, eine seitlich gegen die Umfangsfläche des Werkstücks anliegende Führungsrolle und einen Antriebsmotor für die Schleifscheibe aufweist (US-A-3187467).The invention relates to an edge grinder for plate-shaped workpieces, in particular glass or stone slabs or the like, with a clamping device arranged on the upper end of a stand, in particular consisting of a plurality of horizontally oriented suction clamps, for the edge part lying in a horizontal position with, in particular, freely projecting edges , workpiece to be machined, a horizontally radially directed to the stand, around it in particular by a full 360 ° rotatable cantilever arm and with the help of a slide or the like. guided on the cantilever arm from and to the workpiece, which in particular a pot, ring or plate-shaped, with its lower head surface slightly inclined to the workpiece plane, which can be pressed against the workpiece edge from above, a counter-pressure roller arranged in the area of the grinding disc on the lower workpiece side, a guide tube lying laterally against the peripheral surface of the workpiece llle and has a drive motor for the grinding wheel (US-A-3187467).

Die z. B. aus der DE-PS 1 181 584 bekannten Kantenschleifmaschinen dieser Art werden insbesondere zum Abfasen bzw. Abschrägen der scharfen Kanten von Glasscheiben, Glas- oder Steinplatten, od. dgl. benutzt. Das Schleifaggregat wird dabei durch Drehung des waagerechten Auslegerarms um das auf dem oberen Ende des Ständers festgespannte Werkstück herum geführt und gleichzeitig durch dauernde Anlage der Führungsrolle gegen die Umfangsfläche des Werkstücks und durch Verschiebung in der Längsrichtung des Auslegerarms mit dem Werkstück im Eingriff gehalten. Die mit ihrer unteren Kopffläche zur Werkstückebene geneigte Schleifscheibe wird von oben nach unten gegen die jeweils obere Umfangskante des Werkstücks gedrückt, wobei sie nur mit dem untersten Abschnitt ihrer schräggestellten Kopffläche mit der Werkstückkante in Eingriff kommt.The z. B. from DE-PS 1 181 584 known edge grinding machines of this type are used in particular for chamfering or chamfering the sharp edges of glass panes, glass or stone slabs, or the like. The grinding unit is guided by rotating the horizontal cantilever arm around the workpiece clamped on the upper end of the stand and at the same time is held in engagement with the workpiece by constant contact of the guide roller against the peripheral surface of the workpiece and by displacement in the longitudinal direction of the cantilever arm. The grinding wheel inclined with its lower head surface towards the workpiece plane is pressed from top to bottom against the respective upper peripheral edge of the workpiece, whereby it only engages with the workpiece edge with the lowest section of its inclined head surface.

Aufgabe der Erfindung ist es, bei den Kantenschleifmaschinen der eingangs beschriebenen Art eine genaue, leicht erzielbare Ein- bzw. Nachstellung der Schräglage der Schleifspindel gegenüber dem Werkstück einerseits und der Schnitt- d. h. Schleiftiefe bzw. der Umfangsgeschwindigkeit der Schleifscheibe andererseits zu ermöglichen.The object of the invention is, in the case of the edge grinding machines of the type described at the outset, to set and readjust the inclined position of the grinding spindle relative to the workpiece on the one hand and the cutting edge. H. To allow grinding depth or the peripheral speed of the grinding wheel on the other hand.

Diese Aufgabe wird erfindungsgemäss dadurch gelöst, dass das Schleifaggregat mit Hilfe einer ersten kreisbogenförmigen Führung um eine waagerechte, parallel zum Auslegerarm, d. h. radial zum Werkstück verlaufende Schwenkachse schwenkbar und feststellbar an einem Zwischenhalter befestigt ist, der mit Hilfe einer zweiten kreisbogenförmigen Führung um eine waagerechte, quer zum Auslegerarm d. h. tangential zum Werkstück gerichtete Schwenkachse schwenkbar und feststellbar auf dem in der Längsrichtung des Auslegerarms verschiebbaren Schlitten gelagert ist, wobei die Schleifscheibe am unteren ende einer vertikalen, von einem Hydraulikmotor antreibbaren, im Schleifaggregat durch Handbestätigung auf und ab verschiebbaren Schleifspindel befestigt und der Abwärtshub der Schleifspindel durch mindestens einen einstellbaren Anschlag begrenzt ist.According to the invention, this object is achieved in that the grinding unit with the aid of a first circular arc-shaped guide around a horizontal, parallel to the cantilever arm, i. H. radially to the workpiece pivot axis is pivotally and fixably attached to an intermediate holder, which with the aid of a second circular-arc guide around a horizontal, transverse to the cantilever arm d. H. The swivel axis, which is oriented tangentially to the workpiece, can be pivoted and locked on the slide, which can be moved in the longitudinal direction of the cantilever arm, the grinding wheel at the lower end of a vertical, driven by a hydraulic motor, fastened in the grinding unit by hand confirmation up and down, and the downward stroke of the grinding spindle at least one adjustable stop is limited.

Bei der erfindungsgemässen Ausbildung der Kantenschleifmaschine kann die Schräglage der unteren Kopffläche der Schleifscheibe gegenüber der Werkstückebene durch Verschwenkung des Schleifaggregats mit Hilfe von kreisbogenförmigen Führungen um zwei zueinander senkrechten, waagerechten Schwenkachsen, von denen die eine etwa radial zum Werkstück und die andere etwa tangential zum Werkstück verlaufen, genauestens und dabei auch sehr einfach ein- bzw. nachgestellt werden. Der Antrieb der Schleifspindel mit Hilfe eines Hydraulikmotors ermöglicht es, für die Ein- bzw. Nachstellung der Drehgeschwindigkeit der Schleifspindel bzw. der Umfangsgeschwindigkeit der Schleifscheibe die an sich bekannte, leichte Regelbarkeit der Hydraulikmotoren auszunutzen und die genannten Geschwindigkeiten den jeweiligen Eigenschaften des Werkstücks bzw. der Schleifscheibe anzupassen. Der einstellbare Anschlag zur Begrenzung des Abwärtshubs der handmässig auf und ab verschiebbaren Schleifspindel ermöglicht die Ein- bzw. Nachstellung der Schnitt- bzw. Schleiftiefe und gewährleistet gleichzeitig ein gleichförmiges Abschrägen der Werkstückkanten.In the embodiment of the edge grinding machine according to the invention, the inclined position of the lower head surface of the grinding wheel with respect to the workpiece plane can be pivoted by pivoting the grinding unit with the aid of circular-arc guides around two mutually perpendicular, horizontal pivot axes, one of which is approximately radial to the workpiece and the other approximately tangential to the workpiece , precise and also very easy to set or readjust. The drive of the grinding spindle with the aid of a hydraulic motor makes it possible to use the known, easy controllability of the hydraulic motors for the adjustment or readjustment of the rotational speed of the grinding spindle or the peripheral speed of the grinding wheel and the speeds mentioned to the respective properties of the workpiece or Adjust grinding wheel. The adjustable stop to limit the downward stroke of the grinding spindle, which can be moved up and down by hand, enables the cutting or grinding depth to be adjusted or adjusted and, at the same time, ensures uniform chamfering of the workpiece edges.

Eine besonders vorteilhafte, bevorzugte Ausführungsform der erfindungsgemässen Kantenschleifmaschine ist dadurch gekennzeichnet, dass die Schleifscheibe an dem unteren Ende der Schleifspindel mit Hilfe einer von oben koaxial durch die Schleifspindel hindurch gestechte Befestigungsschraube festgehalten ist und der am oberen ende der Schleifspindel vorgesehene Kopf dieser Befestigungsschraube in der obersten Endstellung der Schleifspindel mit einem passenden, frei drehbar im Schleifaggregat gelagerten Schraubenschlüssel zum Verdrehen der Befestigungsschraube beim An- und Abbauen der Schleifscheibe in Eingriff kommt.A particularly advantageous, preferred embodiment of the edge grinding machine according to the invention is characterized in that the grinding wheel is held at the lower end of the grinding spindle by means of a fastening screw which is coaxially pierced through the grinding spindle from above and the head of this fastening screw provided at the upper end of the grinding spindle is in the uppermost one End position of the grinding spindle comes into engagement with a suitable wrench that is freely rotatable in the grinding unit for turning the fastening screw when attaching and removing the grinding wheel.

Die Erfindung ist nachstehend anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert.

  • Figur 1 zeigt schematisch in schaubildlicher Darstellung den grundsätzlichen Aufbau einer erfindungsgemässen Kantenschleifmaschine ;
  • Figur 2 zeigt in grösserem Masstab eine schematische Draufsicht auf die Bearbeitungsstelle eines plattenförmigen Werkstücks;
  • Figur 3 zeigt einen vertikalen, etwa in der Längsrichtung des Auslegerarms nach Fig. 1 verlaufenden Schnitt durch das Schleifaggregat ;
  • Figuren 4 und 5 sind Teilschnitte nach den Linien IV-IV und V-V der Fig.3.
The invention is explained below with reference to an embodiment shown in the drawing.
  • FIG. 1 shows a diagrammatic illustration of the basic structure of an edge grinding machine according to the invention;
  • Figure 2 shows on a larger scale a schematic plan view of the processing point of a plate-shaped workpiece;
  • FIG. 3 shows a vertical section through the grinding unit, approximately in the longitudinal direction of the cantilever arm according to FIG. 1;
  • Figures 4 and 5 are partial sections according to the Lines IV-IV and VV of Fig.3.

Die dargestellte Kantenschleifmaschine ist insbesondere zum Abfasen bzw. Abschrägen der scharfen Kanten von Glasscheiben, Glasplatten, Steinplatten, od. dgl. bestimmt und besteht aus einem Ständer A, der an seinem oberen Ende eine Spannvorrichtung für die in waagerechter Stellung liegende Glasplatte D aufweist. In dem dargestellten, bevorzugten Ausführungsbeispiel besteht diese Spannvorrichtung aus mehreren, nach oben gerichteten Saugspannern C, die zum Teil direkt auf dem oberen Ständerende und zum Teil auf davon seitlich abstehenden, waagerecht verschwenkbaren Armne B vorgesehen sind. Die Glasplatte D liegt auf diesen in einer waagerechten Ebene ausgerichteten Saugspannern C und wird davon durch Saugzug festgehalten. Der seitlich über den ganzen Glasplattenumfang vorspringende Randteil der festgespannten Glasplatte D mit der zu bearbeitenden Kante D' ist sowohl von oben als auch von unten frei zugänglich.The illustrated edge grinding machine is intended in particular for chamfering or chamfering the sharp edges of glass panes, glass plates, stone plates or the like. It consists of a stand A which has a clamping device at its upper end for the glass plate D lying in a horizontal position. In the preferred embodiment shown, this clamping device consists of a plurality of suction clamps C directed upwards, some of which are provided directly on the upper end of the stand and some on horizontally pivotable arm B projecting therefrom. The glass plate D lies on this in a horizontal plane suction clamps C and is held by suction. The edge part of the clamped glass plate D with the edge D 'to be machined projecting laterally over the entire glass plate circumference is freely accessible both from above and from below.

Ein waagerechter, radial zum Ständer A gerichteter Auslegerarm E ist um den Ständer A herum zumindest um volle 360° drehbar gelagert und trägt einen auf dem Auslegerarm E vom und zum Ständer A, d. h. von und zu der darauf festgespannten Glasplatte D verschiebbaren Schlitten oder Wagen F. Auf diesem Schlitten bzw. Wagen F ist ein Schleifaggregat 1 angeordnet, das eine vorzugsweise topf-, teller- oder ringförmige, den Randteil der Glasplatte D übergreifende Schleifscheibe M aufweist. Ausserdem ist am Schlitten M eine Gegendruckrolle R2 drehbar gelagert, die die Glasplatte D im Arbeitsbereich der Schleifscheibe M unterstützt.A horizontal cantilever arm E directed radially to the stand A is rotatably mounted at least a full 360 ° around the stand A and carries one on the cantilever arm E from and to the stand A, i. H. from and to the glass plate D which is clamped thereon a slide or carriage F. A grinding unit 1 is arranged on this slide or carriage F, which has a preferably pot-shaped, plate-shaped or ring-shaped grinding wheel M which overlaps the edge part of the glass plate D. In addition, a counter pressure roller R2 is rotatably mounted on the slide M, which supports the glass plate D in the working area of the grinding wheel M.

Das Schleifaggregat 1 besteht aus einem Gehäuse 2, das eine etwa vertikale Schleifspindel 6 und den zur Schleifspindel achsparallelen hydraulisch betätigten Antriebsmotor 10 (im folgenden als Hydraulikmotor bezeichnet) enthält. Die Schleifspindel 6 ist mit Hilfe von Kugellagern (4) und einer Abstandshülse 5 in einer äusseren, koaxialen Spindelhülse 3 drehbar gelagert und wird vom Hydraulikmotor 10 über einen Flachriemen 8, über eine auf der Motorwelle befestigte Riemenscheibe 9 und eine auf dem oberen Ende der Schleifspindel 6 befestigte Riemenscheibe 7 angetrieben. Die beiden Riemenscheiben 7, 9 sind verhältnismässig breit, insbesondere als Riementrommeln ausgebildet, um die auf und ab gehende Verschiebung der Schleifspindel 6 gegenüber dem Gehäuse 2 bzw. dem daran befestigten Hydraulikmotor 10 zu ermöglichen.The grinding unit 1 consists of a housing 2 which contains an approximately vertical grinding spindle 6 and the hydraulically actuated drive motor 10 (hereinafter referred to as hydraulic motor) which is axially parallel to the grinding spindle. The grinding spindle 6 is rotatably supported by means of ball bearings (4) and a spacer sleeve 5 in an outer, coaxial spindle sleeve 3 and is driven by the hydraulic motor 10 via a flat belt 8, a pulley 9 fastened to the motor shaft and one on the upper end of the grinding spindle 6 attached pulley 7 driven. The two pulleys 7, 9 are relatively wide, in particular designed as belt drums, in order to enable the grinding spindle 6 to move up and down relative to the housing 2 or the hydraulic motor 10 attached to it.

Die Spindelhülse 3 ist im Gehäuse 2 des Schleifaggregats auf und ab verschiebbar geführt und kann mit Hilfe eines Handhebels,16 bewegt werden. Der Handhebel 16 sitzt dabei fest auf einer Welle 15, mit der ein Paar von nebeneinander angeordneten, gegenseitig abgefederten Zahnsektoren 14, 114 drehfest verbunden ist. Diese Zahnsektoren 14, 114 stehen mit einer äusseren, achsparallelen Verzahnung 103 der Spindelhülse 3 im Eingriff. Die Spindelhülse 3 kann mit Hilfe einer radial gerichteten Klemmschraube 27 mit Hebelgriff im Gehäuse 2 festgesetzt werden.The spindle sleeve 3 is slidably guided up and down in the housing 2 of the grinding unit and can be moved with the aid of a hand lever 16. The hand lever 16 is firmly seated on a shaft 15 to which a pair of mutually spring-loaded toothed sectors 14, 114 are connected in a rotationally fixed manner. These tooth sectors 14, 114 are in engagement with an outer, axially parallel toothing 103 of the spindle sleeve 3. The spindle sleeve 3 can be fixed in the housing 2 with the aid of a radially directed clamping screw 27 with a lever handle.

Die Schleifscheibe M ist an einem darüberliegenden Flansch 11 befestigt, der mit einem oberen mittleren Ansatz 111 in eine kopfseitig im unteren Ende der Schleifspindel 6 vorgesehene Zentrierbohrung eingreift. Die Schleifscheibe M ist dabei an der Schleifspindel 6 mit Hilfe einer Schraube 13 befestigt, die von oben koaxial durch die Schleifspindel 6 gesteckt und in eine entsprechende Gewindebohrung des mittleren Flanschansatzes 111 geschraubt ist. Der Mehrkantkopf 113 der Befestigungsschraube 13 springt vom oberen Kopfende der Schleifspindel 6 in eine mittlere Aussparung der zugeordneten Riemenscheibe 7 vor und ist von oben frei zugänglich. Koaxial zur Schleifspindel 6 und infolgedessen auch koaxial zur Befestigungsschraube 13 ist in der oberen Abschlusswand des Gehäuses 2 ein rohrförmiger, zum Mehrkantkopf 113 der Befestigungsschraube 13 passender Steckschlüssel 25 frei drehbar gelagert, der von aussen mit Hilfe eines Drehknopfs 26, Drehgriffs od. dgl. gedreht werden kann. Mit Hilfe des Handhebels 16, der Zahnsektoren 14, 114 und der Verzahnung 103 kann die Spindelhülse 3 mit der Schleifspindel 6 so weit angehoben werden, dass der Mehrkantkopf 113 der Befestigungsschraube 13 von unten in den ortsfest gelagerten, rohrförmigen Steckschlüssel 25 eingreift. In dieser obersten Stellung der Schleifspindel 6 kann - nach Festsetzung der spindelhülse 6 mit Hilfe der Klemmschraube 27 - die Schleifscheibe M ab- bzw. angebaut werden, wobei die Befestigungsschraube 13 mit Hilfe des oberen, äusseren Drehgriffs 26 und des damit verbundenen, rohrförmigen Steckschlüssels 25 gedreht, d. h. aus- und eingeschraubt wird.The grinding wheel M is fastened to an overlying flange 11, which engages with an upper middle shoulder 111 in a centering hole provided in the head end in the lower end of the grinding spindle 6. The grinding wheel M is fastened to the grinding spindle 6 with the aid of a screw 13 which is coaxially inserted from above through the grinding spindle 6 and screwed into a corresponding threaded hole in the central flange shoulder 111. The polygonal head 113 of the fastening screw 13 projects from the upper head end of the grinding spindle 6 into a central recess in the associated pulley 7 and is freely accessible from above. Coaxial to the grinding spindle 6 and consequently also coaxial to the fastening screw 13, a tubular socket wrench 25 matching the polygonal head 113 of the fastening screw 13 is freely rotatably mounted in the upper end wall of the housing 2 and is rotated from the outside with the aid of a rotary knob 26, rotary handle or the like can be. With the help of the hand lever 16, the tooth sectors 14, 114 and the toothing 103, the spindle sleeve 3 with the grinding spindle 6 can be raised so far that the polygonal head 113 of the fastening screw 13 engages from below in the stationary, tubular socket wrench 25. In this uppermost position of the grinding spindle 6, after the spindle sleeve 6 has been fixed with the aid of the clamping screw 27, the grinding wheel M can be removed or attached, the fastening screw 13 using the upper, outer rotary handle 26 and the tubular socket wrench 25 connected therewith rotated, d. H. is screwed in and out.

Von dem Abwärtshub der Spindelhülse 3 mit der Schleifspindel 6 hängt die Schnitt- bzw. Schleiftiefe der Schleifscheibe M beim Abfasen bzw. Abschrägen der Glasplattenkante D' ab. Der Abwärtshub der Schleifspindel wird infolgedessen je nach der gegebenen Stärke der Glasplatte D bzw. je nach der gewünschten Breite der Kantenabschrägung ein- und nachstellbar begrenzt. Zu diesem Zweck ist im gehäuse 2 des Schleifaggregats 1 eine zur Schleifspindel 6 parallele Stange 18 verschiebbar gelagert, die mit ihrem oberen, dünneren ende 218 aus dem Gehäuse 2 herausgeführt ist. Die Stange 18 weist eine achsparallele Verzahnung 118 auf, mit der ein auf der Welle 15 des Handhebels 16 befestigtes Zahnrad 17 im Eingriff steht. Das obere Ende 218 der Stange 18 wird von einem Anschlagkopf 20 übergriffen, der auf der oberen Aussenseite des Gehäuses 2 um eine zu der Stange 18 parallele Achse 21 drehbar gelagert ist und einen Kranz von achsparallelen, auf dem selben Teilkreis angeordneten Anschlagschrauben 19 trägt. Diese Anschlagschrauben 19 sind in durchgehenden, vertikalen Bohrungen des Anschlagkopfes 20 geschraubt und springen auf dessen Unterseite vor. Durch Verdrehung des Anschlagkopfes 20 können die Anschlagschrauben 19 einzeln nacheinander über die Stange 18 etwa koaxial dazu eingestellt werden. Die entsprechende schrittweise Drehung des Anschlagkopfes 20 wird mit Hilfe einer Rastkugel 22 gewährleistet, die unter Einwirkung einer Feder 23 in zugeordnete, entsprechend der Winkelabstände zwischen den Anschlagschrauben 19 angeordnete Rastvertiefungen 24 eingreift. Die federbelastete Rastkugel 22 kann z. B. im Anschlagkopf 20 gelagert sein, während die Rastvertiefungen 24 in der oberen Aussenfläche des Gehäuses 2 vorgesehen sind. Es ist jedoch auch eine umgekehrte Anordnung möglich.The cutting or grinding depth of the grinding wheel M when chamfering or chamfering the glass plate edge D 'depends on the downward stroke of the spindle sleeve 3 with the grinding spindle 6. The downward stroke of the grinding spindle is consequently limited and adjustable depending on the given thickness of the glass plate D or depending on the desired width of the edge bevel. For this purpose, a parallel to the grinding spindle 6 rod 18 is slidably mounted in the housing 2 of the grinding unit 1, which is led out of the housing 2 with its upper, thinner end 218. The rod 18 has an axially parallel toothing 118, with which a gear 17 fastened on the shaft 15 of the hand lever 16 is in engagement. The upper end 218 of the rod 18 is overlapped by a stop head 20 which is rotatably mounted on the upper outside of the housing 2 about an axis 21 parallel to the rod 18 and carries a ring of axially parallel stop screws 19 arranged on the same pitch circle. These stop screws 19 are screwed into continuous, vertical bores of the stop head 20 and project on the underside thereof. By turning the stop head 20 the stop screws 19 can be individually adjusted approximately coaxially one after the other via the rod 18. The corresponding stepwise rotation of the stop head 20 is ensured with the aid of a detent ball 22 which, under the action of a spring 23, engages in detent recesses 24 which are arranged according to the angular distances between the stop screws 19. The spring-loaded locking ball 22 can, for. B. be stored in the stop head 20, while the locking recesses 24 are provided in the upper outer surface of the housing 2. However, an inverted arrangement is also possible.

Beim Absenken der Spindelhülse 3 zusammen mit der Schleifspindel 6 durch Betätigung des Handhebels 16, wird die Stange 18 in entgegengesetzter Richtung, d. h. nach oben verschoben, wobei sie am Ende der Abwärtsbewegung der Schleifspindel 6 gegen die über das obere Stangenende 218 eingestellte Anschlagschraube 19 stösst und dadurch den Abwärtshub der Schleifspindel begrenzt. Die einzelnen Anschlagschrauben 19 können z. B. so eingestellt werden, dass sie je nach den verschiedenen Stärken der zu bearbeitenden Glasplatten D verschieden weit nach unten vom Anschlagkopf 20 vorspringen und infolgedessen entsprechend unterschiedliche Abwärtshübe der Schleifspindel 6 bestimmen. Bei Änderungen der Stärke der zu bearbeitenden Glasplatten D braucht nur der Anschlagkopf 20 verdreht und die der neuen Plattenstärke entsprechende Anschlagschraube 19 koaxial über die Stange 18 gebracht zu werden. Die Breite der Abfasung bzw. der Abschrägung der Plattenkante D' kann durch Drehung der einzelnen Anschlagschrauben 19 ein- bzw. nachgestellt werden.When lowering the spindle sleeve 3 together with the grinding spindle 6 by actuating the hand lever 16, the rod 18 is in the opposite direction, i. H. shifted upwards, at the end of the downward movement of the grinding spindle 6, it abuts against the stop screw 19 set via the upper rod end 218 and thereby limits the downward stroke of the grinding spindle. The individual stop screws 19 can, for. B. can be set so that depending on the different thicknesses of the glass plates D to be processed project differently downwards from the stop head 20 and consequently determine different downward strokes of the grinding spindle 6. If the thickness of the glass plates D to be processed changes, only the stop head 20 needs to be rotated and the stop screw 19 corresponding to the new plate thickness needs to be brought coaxially over the rod 18. The width of the chamfer or the chamfer of the plate edge D 'can be adjusted or adjusted by rotating the individual stop screws 19.

Das Gehäuse 2 des Schleifaggregats 1 ist mit einem unteren kreisbogenförmigen Wandabschnitt 28 auf einem entsprechenden, oberen, kreisbogenförmigen Wandabschnitt 30 eines darunterliegenden, kastenförmigen Zwischenhalters 34 gelagert und kann infolgedessen gegenüber dem Zwischenhalter 34 um eine durch den Krümmungsmittelpunkt der beiden Wandabschnitte 28, 30 etwa parallel zur Längsachse des Auslegerarms E verlaufende Schwenkachse 29 begrenzt verschwenkt werden. Die Schwenkachse 29 liegt etwa in der unteren Kopffläche der Schleifscheibe M und schneidet dabei die Drehachse der Schleifscheibe M, wie insbesondere in Fig. dargestellt ist. In dem oberen kreisbogenförmigen Wandabschnitt 30 des kastenförmigen Zwischenhalters 34 ist ein Gewindebolzen 31 festgelegt, der durch ein sich in der Schwenkrichtung des Schleifaggregats 1 erstreckendes Langloch 32 des anliegenden, unteren, kreisbogenförmigen Wandabschnitts 28 des Gehäuses 2 greift und im Inneren des Gehäuses 2 eine durch eine seitliche Öffnung 33 zugängliche Schraubenmutter trägt. Mit Hilfe dieses Bolzens 31 kann das Gehäuse 2 des Schleifaggregats 1 in seiner gegenüber dem Zwischenhalter 34 eingestellten Winkelstellung festgesetzt werden.The housing 2 of the grinding unit 1 is mounted with a lower circular wall section 28 on a corresponding, upper circular wall section 30 of an underlying, box-shaped intermediate holder 34 and can consequently be compared to the intermediate holder 34 by a through the center of curvature of the two wall sections 28, 30 approximately parallel to Longitudinal axis of the extension arm E extending pivot axis 29 can be pivoted to a limited extent. The pivot axis 29 lies approximately in the lower head surface of the grinding wheel M and thereby intersects the axis of rotation of the grinding wheel M, as is shown in particular in FIG. In the upper circular wall section 30 of the box-shaped intermediate holder 34, a threaded bolt 31 is fixed, which engages through an elongated hole 32 in the pivoting direction of the grinding unit 1 of the adjacent, lower, circular wall section 28 of the housing 2 and one inside through a housing 2 side opening 33 accessible screw nut carries. With the help of this bolt 31, the housing 2 of the grinding unit 1 can be fixed in its angular position set with respect to the intermediate holder 34.

Der Zwischenträger 34 weist eine seitliche, kreisbogenförmig gekrümmte Wange 35 auf, die gegen einen entsprechenden, kreisbogenförmigen, vom Schlitten oder Wagen F nach oben vorspringenden Führungsflansch 36 anliegt. Infolgedessen kann der Zwischenhalter 34 zusammen mit dem Schleifaggregat 1 um eine durch den Krümmungsmittelpunkt der Wange 35 und des Führungsflansches 36 quer zur Längsachse des Auslegerarms E d. h. rechtwinklig zur Schwenkachse 29 verlaufende Schwenkachse 129 begrenzt verschwenkt werden. Auch diese Schwenkachse 129 liegt etwa in der unteren Kopffläche der Schleifscheibe M und geht durch die Drehachse der Schleifscheibe M, wie insbesondere aus Fig.3 hervorgeht. Die kreisbogenförmige Wange 35 des Zwischenhalters 34 kann formschlüssig mit dem kreisbogenförmigen Führungsflansch 36 des Schlittens F verbunden und mit Hilfe einer handbetätigten Spann- bzw. Sperrvorrichtung 37 am Führungsflansch 36 festlegbar sein.The intermediate carrier 34 has a lateral, circular arc-shaped cheek 35 which bears against a corresponding, circular arc-shaped guide flange 36 which projects upwards from the carriage or carriage F. As a result, the intermediate holder 34, together with the grinding unit 1, can be moved through the center of curvature of the cheek 35 and the guide flange 36 transversely to the longitudinal axis of the cantilever arm E d. H. pivot axis 129 extending at right angles to the pivot axis 29 can be pivoted to a limited extent. This pivot axis 129 also lies approximately in the lower head surface of the grinding wheel M and passes through the axis of rotation of the grinding wheel M, as can be seen in particular from FIG. The circular arc-shaped cheek 35 of the intermediate holder 34 can be positively connected to the circular-arc-shaped guide flange 36 of the slide F and can be fixed on the guide flange 36 with the aid of a manually operated clamping or locking device 37.

Mit Hilfe der beiden kreisbogenförmigen Führungen 28, 30 und 35, 36 kann das Schleifaggregat 1 derart um die beiden, rechtwinklig zueinander verlaufenden Schwenkachsen 29 und 129 verschwenkt und eingestellt werden, dass die untere, kreisringförmige Kopffläche der Schleifscheibe M die gewünschte bzw. erforderliche, gegenüber der Ebene der Glasplatte D geneigte Arbeitsstellung einnimmt, in der die Schleifscheibe M mit der abzuschrägenden Kante D' der Glasplatte D nur im Bereich eines begrenzten Abschnitts M' ihrer unteren, kreisringförmigen Kopffläche in Eingriff kommt.With the aid of the two circular guides 28, 30 and 35, 36, the grinding unit 1 can be pivoted and adjusted about the two pivot axes 29 and 129, which run at right angles to one another, such that the lower, circular head surface of the grinding wheel M is opposite the desired or required the plane of the glass plate D assumes an inclined working position in which the grinding wheel M only engages with the beveled edge D 'of the glass plate D in the region of a limited section M' of its lower, circular head surface.

Auf dem Schlitten F bzw. auf dem Zwischenhalter 34 ist eine Führungsrolle R1 mit vertikaler Achse frei drehbar und höheneinstellbar gelagert. Im Betrieb wird das Schleifaggregat 1 z. B. in der Pfeilrichtung Z2 derart um die zu bearbeitende Glasplatte D umgeführt, dass die Führungsrolle R1 dauernd gegen die Umfangsfläche der Glasscheibe D anliegt. Dabei wird der Auslegerarm E um den Ständer A gedreht und der Schlitten F mit dem Schleifaggregat 1 auf dem Auslegerarm E verschoben. Die Schleifscheibe M wird mit Hilfe des Handhebels 16 von oben gegen die obere, scharfe Umfangskante D' der Glasplatte D gedrückt. Die Drehrichtung der Schleifscheibe M ist in Fig. mit der Pfeilrichtung Z1 angegeben. Die einstellbare Begrenzung des Abwärtshubs der Schleifscheibe M gewährleistet eine gleichmässig breite Abschrägung D" der Glasplattenkante D'. Dem Arbeitsbereich M' der Schleifscheibe M wird Kühl- bzw. Spülflüssigkeit mit Hilfe eines durch die rohr- bzw. ringförmige Führungsrolle R1 durchgeführten Röhrchens 38 zugeführt.On the carriage F or on the intermediate holder 34, a guide roller R1 with a vertical axis is freely rotatable and adjustable in height. In operation, the grinding unit 1 z. B. in the direction of the arrow Z2 in such a way around the glass plate D to be machined that the guide roller R1 continuously bears against the peripheral surface of the glass pane D. The cantilever arm E is rotated around the stand A and the carriage F with the grinding unit 1 is moved on the cantilever arm E. The grinding wheel M is pressed with the help of the hand lever 16 from above against the upper, sharp peripheral edge D 'of the glass plate D. The direction of rotation of the grinding wheel M is indicated by the arrow direction Z1 in FIG. The adjustable limitation of the downward stroke of the grinding wheel M ensures a uniformly wide bevel D "of the glass plate edge D '. The working area M' of the grinding wheel M is supplied with cooling or rinsing liquid with the aid of a tube 38 passed through the tubular or annular guide roller R1.

Claims (8)

1. An edge grinding machine for plate-shaped workpieces, particularly plates of glass or stone or the like, comprising a gripping means for gripping the workpiece which is to be machined and which is disposed in a horizontal position with in particular edge portions thereof projecting freely on all sides, said gripping means being disposed on the upper end of a support (A) and comprising in particular a plurality of horizontally disposed suction grippers (C), a cantilever arm which is disposed horizontally radially with respect to the support (A) and which is rotatable around the support in particular through a full 360°, and a grinding unit (1) which is guided displaceably by means of a carriage or the like on the cantilever arm, from and towards the workpiece, and which comprises a grinding wheel (M) which in particular is of a cup-shaped, annular or plate-shaped configuration and which is somewhat inclined with its underneath head surface relative to the plane of the workpiece and which can be pressed against the edge of the workpiece from above, a counter-pressure roller (R2) which is arranged in the region of the grinding wheel on the underside of the workpiece, a guide roller which bears laterally against the peripheral surface of the workpiece, and a drive motor for the grinding wheel, characterised in that the grinding unit (1) is secured to an intermediate holder (34) In such a way as to be pivotal and lockable about a horizontal pivot axis (29) extending parallel to the cantilever arm (E), that is to say, radially with respect to the workpiece (D), by means of a first arcuate guide (28, 30), which intermediate holder (34) is mounted on the carriage (F) which is displaceable in the longitudinal direction of the cantilever arm (E), in such a way as to be pivotal and lockable about a horizontal pivot axis (129) directed transversely with respect to the cantilever arm (E), that is to say, tangentially with respect to the workpiece (D), by means of a second arcuate guide (35, 36), wherein the grinding wheel (M) is secured to the lower end of a vertical grinding spindle (6) which is drivable by a hydraulic motor (10) and which is displaceable upwardly and downwardly in the grinding unit (1) by manual actuating means (16), and the downward stroke movement of the grinding spindle (6) is restricted by at least one adjustable abutment (19).
2. An edge grinding machine according to claim 1 characterised in that the grinding wheel (M) is secured to the lower end of the grinding spindle (6) by means of a fixing screw (13) which is fitted from above coaxially through the grinding spindle (6), and the head (113) of said fixing screw (13), which is disposed at the upper end of the grinding spindle, comes into engagement in the uppermost limit position of the grinding spindle (6) with a screw engaging tool (25) which fits to the screw head and which is mounted freely rotatably in the grinding unit (1), for turning the fixing screw (13) when fitting and removing the grinding wheel (M).
3. An edge grinding machine according to claim 1 and claim 2 characterised in that the grinding wheel (M) is secured to a flange (11) which engages with an upper central projection (111) into a corresponding centering bore in the lower end of the grinding spindle (6) and has an upper screwthreaded bore (12) for the fixing screw (13).
4. An edge grinding machine according to claim 1 and claim 2 characterised in that the fixing screw (13) has an upper polygonal head (113) and the screw engaging tool (25) which is mounted rotatably about a stationary position is formed as a tubular socket tool (25) having an outer actuating handle portion (26).
5. An edge grinding machine according to claim 1 characterised in that the upwardly directed shaft of the hydraulic motor (10) is arranged parallel to the grinding spindle (6) and is drivingly connected thereto by a flat belt (8) and two belt pulleys (7, 9) of an enlarged drum-like configuration.
6. An edge grinding machine according to claim 1 characterised in that associated with a rod (18, 218) which is displaceable synchronously and proportionally with the grinding spindle (6) by the manual actuator (16) thereof are a plurality of abutments (19) which are carried by an abutment head member (20) and which can be differently adjusted, which abutments can be individually moved succesively into an abutment position by rotation of the abutment head member (20).
7. An edge grinding machine according to claim 6 characterised in that an abutment head member (20) which is mounted beside the rod (18, 218) rotatably about an axis (21) parallel thereto carries a plurality of abutment screws (19) which have their axes parallel to the axis (21) and which extend through the abutment head member and which are arranged at angularly displaced positions relative to each other on the same pitch circle, the abutment head member (20) engaging over the end of the rod (18,218) with the region of the abutment head member having the abutment screws (19).
8. An edge grinding machine according to claim 1 characterised in that a pipe (38) for the flushing or cooling fluid, which is directed against the operating region (M') of the grinding wheel (M), is passed through the guide roller (R1) which is of a tubular or annular configuration.
EP81100704A 1980-02-08 1981-01-31 Edge grinding machine for plate-shaped workpieces, particularly plates of glass or stone Expired EP0033922B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81100704T ATE4872T1 (en) 1980-02-08 1981-01-31 EDGE GRINDING MACHINE FOR PLATE-SHAPED WORKPIECES, ESPECIALLY GLASS OR STONE PLATES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1512580 1980-02-08
IT1512580 1980-02-08

Publications (3)

Publication Number Publication Date
EP0033922A2 EP0033922A2 (en) 1981-08-19
EP0033922A3 EP0033922A3 (en) 1982-03-10
EP0033922B1 true EP0033922B1 (en) 1983-10-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP81100704A Expired EP0033922B1 (en) 1980-02-08 1981-01-31 Edge grinding machine for plate-shaped workpieces, particularly plates of glass or stone

Country Status (3)

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EP (1) EP0033922B1 (en)
AT (1) ATE4872T1 (en)
DE (1) DE3161060D1 (en)

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US5185959A (en) * 1990-03-29 1993-02-16 Tamglass Oy Apparatus for grinding the edge of a glass sheet
ATE169542T1 (en) * 1994-09-21 1998-08-15 Wolfgang Mayer MACHINE FOR SURFACE PROCESSING THE EDGES OF A TOMBSTONE
ES2143347B1 (en) * 1996-07-10 2001-01-16 Crespillo Manuel Arjona MACHINE TO POLISH SONGS OF MARBLE PIECES.
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CN113510577B (en) * 2021-04-25 2023-03-31 佛山市顺德区新时泰家具实业有限公司 Raw material pretreatment process for manufacturing leisure chair
CN116423331B (en) * 2023-06-14 2023-08-11 河北德航玻璃制品有限公司 Automatic conveying edge grinding machine for toughened glass

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DE466492C (en) * 1926-08-19 1928-10-06 Jacob Heinrich Bek Grinding flat facets on glass plates
US1958734A (en) * 1932-12-24 1934-05-15 Mary A Woodsmall Universal grinder
US2401486A (en) * 1943-12-06 1946-06-04 Toledo Plate & Window Glass Co Beveling machine
DE1759738U (en) * 1957-01-25 1958-01-09 Prokasky & Bechtold O H G DEVICE FOR SANDING EDGES ON FLAT GLASS.
FR1307078A (en) * 1961-11-29 1962-10-19 Transportable apparatus for grinding the edges of slabs of compact material, particularly slabs of marble, glass or the like
US3187467A (en) * 1962-04-11 1965-06-08 Cortesi Antonio Machine for bevelling the edges of glass plates or the like
US4060938A (en) * 1976-04-20 1977-12-06 Barron Sr Lee H Glass beveling machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3625535C1 (en) * 1986-07-29 1988-02-25 Festo Kg Eccentric-plate grinder
CN104400598A (en) * 2014-11-04 2015-03-11 无锡市华明化工有限公司 Improved grinding machine

Also Published As

Publication number Publication date
DE3161060D1 (en) 1983-11-10
EP0033922A2 (en) 1981-08-19
EP0033922A3 (en) 1982-03-10
ATE4872T1 (en) 1983-10-15

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