EP0084506A2 - Procedure and devices for positioning a machine for treating the edges of plassplates - Google Patents

Procedure and devices for positioning a machine for treating the edges of plassplates Download PDF

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Publication number
EP0084506A2
EP0084506A2 EP83400131A EP83400131A EP0084506A2 EP 0084506 A2 EP0084506 A2 EP 0084506A2 EP 83400131 A EP83400131 A EP 83400131A EP 83400131 A EP83400131 A EP 83400131A EP 0084506 A2 EP0084506 A2 EP 0084506A2
Authority
EP
European Patent Office
Prior art keywords
tool
glass sheet
carrying
feeler member
working tool
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP83400131A
Other languages
German (de)
French (fr)
Other versions
EP0084506A3 (en
Inventor
Friedrich Halberschmidt
Heinz-Josef Reinmold
Josef Audi
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.)
Vegla Vereinigte Glaswerke GmbH
Saint Gobain Vitrage SA
Original Assignee
Vegla Vereinigte Glaswerke GmbH
Saint Gobain Vitrage SA
Saint Gobain Vitrage International SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vegla Vereinigte Glaswerke GmbH, Saint Gobain Vitrage SA, Saint Gobain Vitrage International SA filed Critical Vegla Vereinigte Glaswerke GmbH
Publication of EP0084506A2 publication Critical patent/EP0084506A2/en
Publication of EP0084506A3 publication Critical patent/EP0084506A3/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • 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
    • B24B9/107—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 for glass plates while they are turning
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/30084—Milling with regulation of operation by templet, card, or other replaceable information supply
    • Y10T409/300896—Milling with regulation of operation by templet, card, or other replaceable information supply with sensing of numerical information and regulation without mechanical connection between sensing means and regulated means [i.e., numerical control]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/30084—Milling with regulation of operation by templet, card, or other replaceable information supply
    • Y10T409/301176—Reproducing means
    • Y10T409/301568—Reproducing means by use of pivotally supported tracer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/306664—Milling including means to infeed rotary cutter toward work
    • Y10T409/306776—Axially
    • Y10T409/306832—Axially with infeed control means energized in response to activator stimulated by condition sensor

Definitions

  • the present invention relates to the control of a machine for working the edges of a sheet of glass carried by a rotating support plate, a machine whose working tool is movable in the direction of the axis of rotation of the support plate and is subject to remain in contact with the edges of the glass sheet to be worked.
  • a machine of this type for grinding the edges of glass sheets is described for example in document DE-OS 1 928 162.
  • the grinding tool is guided by a roller which is associated with it and which s 'presses a template having a shape corresponding to the shape of the glass sheet to be ground, said template being placed parallel to the glass sheet and rotating at the same time as it.
  • the object of the invention is to provide a machine for processing the edges of glass sheets, in particular a grinding machine which does not have these constraints, in particular a machine which does not require a template or a new control program when the glass model to work changes.
  • the machine to position the working tool relative to the glass sheet, unlike the known art, no template, no preset program specific to each glass sheet is necessary.
  • the machine itself explores the outline of the glass sheet and establishes itself, after its exploration, a program for controlling the working tool.
  • the path or location information is supplied to a memory only for a portion of the periphery of the glass sheet and extracted from the memory when necessary.
  • the information is collected by a movable feeler in the direction of the axis of rotation of the glass support plate which is located in front of the working tool, that is to say which explores the areas to be worked before the work tool, and offset by a given angle ( ⁇ , ⁇ ) (alpba, beta) relative to it.
  • the signals corresponding to the position values of the points of the edge of the glass sheet are entered into a shift register and after crossing the register after a tenps corresponding to the tenps that the support plate puts to turn the angle ( ⁇ , ⁇ ) (alpha, beta) which separates the contact points on the edge of the glass from the feeler member and the working tool, are used to control a motor which positions the working tool.
  • the memory temporarily always only contains the path information corresponding to the path section located between the feeler member and the working tool.
  • the invention makes it possible not only to grind successively and in any order of the glass sheets of any shape, but also to remove all the constraining apertures of precise positioning of the glass sheets. This considerably increases the possibilities of using the grinding machine and eliminates the stops which for the previous machines were necessary at each change of program or template.
  • the invention is mainly used mainly for the control of a grinding machine acting on the edges of a glass sheet, but it can also be applied to the control of another machine acting on the edges of any object or even on the surface of said object object, the areas of the surface being identified with respect to the edges.
  • certain glazing units have the periphery of their surface covered with an electrically conductive strip, or with a decorative strip, machines controlled according to the method of the invention may advantageously be used for depositing such strips.
  • the working tool in particular a grinding member, and a feeler member can be mounted offset by an angle ⁇ (alpha) relative to each other, each on a carriage can be moved linearly radially with respect to the axis of rotation of the glass support plate, and the carriage carrying the feeler member can be provided with a path indicator delivering an electrical signal representative of the path identified, said signal having entered the shift register of a memory, then after a delay corresponding to the time of rotation of the angle ⁇ (alpha) by the support plate, directed on an amplifier then on the regulation system of the drive mechanism of the carriage carrying the working tool.
  • the working tool is carried by an oscillating arm and moves on a circular path
  • the feeler member is carried by a swing arm scond offset by an angle ⁇ (beta)
  • the information of path noted by the feeler member are entered into a memory from which they are extracted after a certain time lag to control the positioning motor of the arm carrying the working tool.
  • a constant torque motor acting by means of a shaft on the carriage carrying the feeler member ensures constant pressure of the feeler member in the event that it can be moved linearly, this engine also being loaded to advance the feeler roller from a rest position in the working position and from the working position to the rest position.
  • a constant torque dicer is also mounted on the pivot axis of the swinging arm and ensures constant pressure of the feeler member as well as the advancement of this feeler member towards the sheet of glass to be worked.
  • the working tool is also advantageous for the working tool to be pressed against the edge of the glass sheet by means of a constant torque motor with a constant or adjustable force.
  • the pressure can be changed during a grinding operation using this constant torque motor, for example when passing around sharp corners.
  • a tachometer generator is connected to the shaft of the tool positioning motor, and the signals it emits at the same time as the signals from the path indicator which determine the position of the tool, are transmitted to an operating unit whose output signal is used to regulate the speed of the drive motor in rotation of the support plate.
  • the invention is illustrated in the form of a machine for grinding the edges of glass sheets, although it can also be applied to other machines.
  • the glass sheet 1 to be ground is mounted on a rotating support plate 2, for example with a suction cup. This is moved slowly in rotation by a drive motor 3 during grinding.
  • the grinding tool 6 is mounted on a carriage 7.
  • the carriage 7 moves radially relative to the axis of the turntable 2 on rails 8 not shown in Figure 1.
  • a feeler roller 11 also mounted on a carriage 12 can be moved radially relative to the axis of the turntable 2 is offset by an angle ⁇ (alpha) relative to the direction of movement of the grinding tool 6 in the opposite direction to that of the rotation of the turntable 2.
  • This carriage 12 is also movable on rails not shown.
  • the carriage 12 carrying the feeler roller 11 can be moved by means of a screw 14 actuated by a motor 16.
  • the engine 16 is a constant torque motor which maintains a constant pressure of the feeler roller 11 against the glass sheet. By the action of this motor 16, the carriage 12 can also be moved away from the plate 2 during the rest periods.
  • a tachometer generator 13 is coupled to the screw 14 or to the motor 16 for controlling the speed of change of position of the feeler roller 11.
  • the signals from the tachometer generator 13 are used to regulate the pressure of the grinding tool 6 on the glass and are therefore supplied to the measurement triggering device 95.
  • the feeler roller 11 is rotated by a motor 15.
  • the position of the carriage 12 carrying the feeler roller 11 is indicated by the path indicator 18.
  • the path indicator 18 has the form of a sliding contact forming a cursor which moves along a resistor 19 and which takes an electric voltage corresponding to the position of the sensor roller. This voltage is brought via line 20 to the analog-digital converter 21 in which a corresponding digital value is formed which is then entered in memory in the shift register 22.
  • the shift register 22 can be part of a microcomputer.
  • the shift register 22 which is clocked by a clock signal generator 23, which is also coupled to the drive shaft 24 of the turntable 2, so that the clock rate depends on the speed of rotation of the turntable 2.
  • the output of the shift register 22 is connected to the input of the analog converter 25, the output of which provides a voltage used for positioning control of the grinding tool.
  • the shift register 22 is designed such that the setpoint voltage for the tool positioning command appears at the output of the register after a time interval equal to the tenps set by the turntable 2 to turn by the angle ⁇ (alpha) between the two radial directions which pass by the feeler roller 11 on the one hand and the grinding tool 6 on the other hand; that is to say that after rotation of the plate 2 by the angle ⁇ (alpha), the grinding tool 6 occupies with respect to the center of the rotary plate 2 the position occupied by the feeler roller 11 before said rotation .
  • the positioning of the grinding tool 6 is ensured by a motor 28 fixed to the frame of the machine, which acts by means of the screw 29 on the carriage 7 carrying the grinding tool 6.
  • This motor 28 is put in action by the regulating amplifier 31 via line 30.
  • the carriage 7 carrying the grinding tool 6 is also provided with a path indicator 34 which has the form of a sliding contact forming a cursor which moves along the resistor 35.
  • the electric voltage drawn by the indicator path 34 is transmitted to the control amplifier 31 via line 36 as the actual value of the position of the grinding tool.
  • the path indicator 34 has yet another function. It in fact governs, in conjunction with a tachometer generator 38 coupled to the motor shaft 28, the rotation speed of the motor 3 driving the turntable 2. The purpose of this adjustment of the speed of rotation of the turntable is to maintain constant the effective grinding speed. When changing the position of the grinding tool 6, the movement of the grinding head is superimposed on the rotational movement of the glass sheet 1, which leads to an undesirable increase or decrease in the effect grinding.
  • the grinding pressure exerted by the grinding tool 6 on the edge of the glass sheet is measured in the form of the two pressure components using two dynamometric capsules 47 and 48.
  • the grinding 6, including the grinding wheel drive motor is mounted on a mounting plate 49 which, for its part, is mechanically connected to the carriage 7 by means of the torque capsules 47 and 48.
  • the force component measured by the dynamometric capsule 47 depends on the position of the edge of the glass sheet and can take both a positive and a negative value since this position of the edge of the glass sheet relative to the grinding wheel can vary continuously.
  • the values coming from the two dynamametric capsules 47 and 48, converted into electrical voltages U l and U 2 are introduced into the computer 50 which forms the geometric sum Ui st of the two values U l and U 2 .
  • the voltage U ist constitutes the actual value of the regulation circuit. This actual value and the set value set by the potentiometer 46 are supplied to the regulation amplifier 51 which operates the constant torque motor 45.
  • regulation of the grinding pressure can also be carried out according to a program for the entire periphery of the glass sheet.
  • the grinding pressure is then reduced at each corner of the glass sheet 1 and is increased again after treatment of this corner.
  • the potentiometer 46 is replaced by several potentiometers which are switched on or off one after the other in accordance with the program.
  • a circuit for such programming of the grinding pressure is illustrated in FIG. 3.
  • the programming shown is intended for a sheet of glass with several corners. It essentially uses a current digital preselection sensor 90 presenting 10 preselection possibilities, thanks to which the grinding pressure can be modified, in maximum 5 corners, in particular decrease it, then restore it to its normal value after passing the corner.
  • the potentiometer R1 is used to adjust the normal pressure, while the pressure at each corner of the glass sheet is adjusted in order by the patentiometers R2 to R6.
  • the control voltage is supplied to the regulating amplifier 51 via the line 91 and the contact Pl.
  • the potentiometer R7 is used, when the entire periphery of the glass sheet has been processed, that is to say say at the end of the grinding operation, to remove the grinding pressure and to retract the grinding head to its starting position.
  • the control voltage adjusted by means of potentiometer R7 is supplied to the regulation amplifier 51 via contact P2.
  • the control signals for modifying the grinding pressure at the corners are supplied by the tachometer machine 13.
  • This signal formed by a voltage value and the change in polarity of the voltage is used as a control signal for the activation of the preselection counter 90. Since the grinding pressure must only be modified for relatively angles treble, the signal from the tachometer machine 13 is first transmitted to a measurement trigger device 95. With the potentiometer 96, the desired switching point is set by this measurement trigger device 95, c that is, it is established from which threshold a modification of the grinding pressure must be carried out.
  • the relay dl is actuated for a short period of time.
  • Relay d2 is energized by relay dl and is then maintained spontaneously.
  • the relay d2 simultaneously supplies the digital preset counter 90, which at this time is still zero, by means of the pulses which come from the generator 23 driving the shift register 22 and coupled to the shaft 24 of the turntable 2.
  • the preset counter 90 is programmed in such a way that after the rotation of the glass sheet by the angle ⁇ (alpha), the relay Z1 operates. This relay Zl ensures that the patentiometer R2 supplies the setpoint value at this time while previously, this setpoint was supplied by the potentiometer R1.
  • the preselection determines for which - rotation angles of the support plate 2 the potentiometer R2 remains triggered.
  • the relay Z2 When the relay Z2 is activated, the control voltage is brought back to the potentiometer R1 and the circuit to the erasing device d3 is simultaneously interrupted. This triggers relay d2; therefore, the counter "timer" is interrupted and the preselection counter is thus maintained.
  • the relay d2 is again closed and the operation described above is repeated, this time however via the preselection relays Z3 and Z4.
  • the described operation is repeated again.
  • the preselection relays Z5 and Z6 which are requested, in case the glass sheet has a fourth and a fifth corner, this operation is repeated again by means of the preselection relays Z7 and Z8 and respectively Z9 and Z10.
  • the digital preset counter 90 is reset to zero via the erasing input 98.
  • the operating mode of the grinding machine shown is as follows.
  • the feeler roller 11 and the grinding tool 6 are first of all in a retracted rest position.
  • the glass sheet 1 is placed on the support plate 2 by suction cup example.
  • the support plate is connected to the vacuum, the glass sheet is maintained and the cycle can be started.
  • the turntable 2 starts to move.
  • the speed of rotation of the drive motor 3 being determined by the path indicator 34, as a function of the position of the grinding head 6, this speed is a fixed speed defined in advance.
  • the motor 16 is energized, whereby the carriage 12 and the feeler roller 11 move in the direction of the glass sheet until the feeler roller 11 is pressed against the edge of the glass sheet 1 under the pressure determined by the motor 16 operating as a constant torque motor.
  • the electronic regulation device engages, which starts the grinding operation proper.
  • the carriage 7 with the grinding tool 6 is adjusted offset from the angle ⁇ (alpha) by relative to the feeler roller and the assembly moves along the glass sheet while maintaining the initial offset.
  • the regulation system including the regulation of the pressure of the grinding wheel then operates cam described previously.
  • FIG. 4 illustrates another embodiment of the device according to the invention which differs from the embodiment described above by the fact that the probe head and the grinding tool are not mounted on carriages that can be moved linearly, but each on an oscillating arm that can pivot, so that they are each guided along a circular path.
  • the structural t ure and the mode of operation of this embodiment are as described below.
  • the glass sheet 1 to be ground is again mounted on a rotary table with suction cup 2 which is rotated by a drive motor 53.
  • the grinding tool 56 is mounted at the end of an oscillating arm 57 which can pivot around the axis of rotation 58.
  • the pivoting of the swinging arm 57 is obtained by the motor 59 which determines the angular position ⁇ (epsilon) of the swinging arm 57 and thus the position of the grinding tool 56.
  • On the swing arm 57 acts in addition the constant torque motor 60 disposed concentrically with the axis of rotation 58 which, independently of the angular position of the swing arm 57 ensures constant grinding pressure or, as described above, with reference to FIG. 3 , a grinding pressure adjusted if necessary according to a program.
  • a second swing arm 63 is mounted on the axis of rotation 64 and is offset from the first by the angle ⁇ (beta), that is to say in the case shown, by 180 ° in the direction of the rotation of the turntable 2.
  • the swing arm 63 has the same length as the swing arm 57 and carries the feeler roller 65 at its outer end.
  • An independent motor 66 drives the feeler roller 65 and keeps the friction losses as low as possible.
  • the constant torque motor 67 acting on the oscillating arm 63 ensures, on the one hand, that the feeler roller 65 is pressed against the edge of the glass sheet every day with constant force and, on the other hand, serves after performing the probing, to return the swinging arm 63 to its rest position, or before the start of the grinding operation, that is to say after installation. of the glass sheet 1, on the suction plate 2, to bring the feeler roller 65 against the edge of the sheet.
  • the position of the feeler roller 65 i.e. the value of the pivot angle ⁇ (gamma) is established by the angle indicator 68 also coupled to the axis of rotation 64 of the swing arm 63.
  • the angle indicator 68 provides a signal corresponding to the angle ⁇ ( gamma) in the form of a direct voltage which is converted into a corresponding digital value in the analog-digital converter 71.
  • the digitized signal is then supplied to the shift register 72 which is clocked by the clock signal generator 74 coupled to the drive shaft 73 of the turntable 2 and which is arranged so that the values entered in the shift register 72 appear at the output of the shift register after a tenps interval in which the turntable 2 has rotated of the angle ⁇ (beta), that is to say in the illustrated case of 180 °.
  • the shift register 72 which can also be part of a microcomputer, the signals are fed to the digital-analog converter 75 and the analog voltage value appearing at the output of this converter 75 serves as a reference voltage for the regulation amplifier 76 which controls the adjustment motor 59 for the swing arm 57 via the line 77.
  • the angle indicator 82 coupled to the axis 58 of the swing arm 57 provides the actual value of the angular position ⁇ (epsilon) of the swinging arm 57 which serves as a feedback of the real value supplied via the line 79 to the regulating amplifier 76.
  • the speed of the motor 53 of the turntable is again adjusted as a function of the angular position of the swing arm 57 and of its pivoting speed.
  • the voltage U W of the angle indicator 82 and, on the other hand, the voltage U T of the tachometer machine 80 coupled to the shaft 58 of the swing arm 57 are combined in the electronic component 84 so that the output voltage U S of this electronic component 84 is supplied to the control amplifier 85 as a reference voltage for the engine speed 53.
  • the real speed value coming from the machine Tachometer 78 is brought via line 86 to the regulation amplifier 85.
  • the value of setpoint of the grinding pressure is adjusted by the potentiometer 81 or according to a given preset program, as described previously with reference to FIG. 3, and is supplied to the regulation amplifier 87 for the constant torque motor 60.
  • the grinding tool 56 itself is mounted on the swinging arm 57 with the insertion of two dynamometric capsules 88, 89 which supply the computer 92 with the magnitude of the two components of the effective grinding pressure force in the form of positive electrical voltages or negative.
  • the computer 92 forms the geometric sum of the two voltage values and the resulting voltage is supplied to the regulation amplifier 87 as the actual value of the regulation circuit.

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

Abstract

La présente invention concerne le pilotage d'une machine de travail des bords d'une feuille de verre. Dans une machine dans laquelle la feuille de verre est porteé par un plateau tournant et dans laquelle l'outil de travail est assujetti à rester en contact avec les bords de la feuille de verre, l'invention propose de prélever des indications concernant la position que devra prendre l'outil de travail, à l'aide d'un organe palpeur en avant de l'outil de travail décalé d'un angle fixe, ces indications étant entrées dans un registre à décalage et utilisées après un décalage dans le temps correspondant au temps mis par le support tournant pour tourner de l'angle dont sont décalés l'organe palpeur et l'outil de travail, pour alimenter le moteur commandant la mise en position de l'outil de travail. L'invention est applicable au pilotage d'une machine de meulage ou de dépôt des bandes conductrices ou décoratives.The present invention relates to the control of a machine for working the edges of a glass sheet. In a machine in which the glass sheet is carried by a turntable and in which the working tool is subject to remain in contact with the edges of the glass sheet, the invention proposes to take indications concerning the position that must take the work tool, using a feeler in front of the work tool offset by a fixed angle, these indications being entered in a shift register and used after a corresponding time shift the time taken by the rotating support to turn the angle by which the feeler member and the working tool are offset, to supply the motor controlling the positioning of the working tool. The invention is applicable to the control of a machine for grinding or depositing conductive or decorative strips.

Description

La présente invention concerne le pilotage d'une machine de travail des bords d'une feuille de verre portée par un plateau support tournant, machine dont l'outil de travail est déplaçable en direction de l'axe de rotation du plateau support et est assujetti à rester en contact avec les bords de la feuille de verre à travailler.The present invention relates to the control of a machine for working the edges of a sheet of glass carried by a rotating support plate, a machine whose working tool is movable in the direction of the axis of rotation of the support plate and is subject to remain in contact with the edges of the glass sheet to be worked.

Une machine de ce type, pour meuler les bords de feuilles de verre est décrite par exenple dans le document DE-OS 1 928 162. Dans cette réalisation connue, l'outil de meulage est guidé par un galet qui lui est associé et qui s'appuie sur un gabarit ayant une forme correspondant à la forme de la feuille de verre à meuler, ledit gabarit étant placé parallèlement à la feuille de verre et tournant en même temps qu'elle.A machine of this type, for grinding the edges of glass sheets is described for example in document DE-OS 1 928 162. In this known embodiment, the grinding tool is guided by a roller which is associated with it and which s 'presses a template having a shape corresponding to the shape of the glass sheet to be ground, said template being placed parallel to the glass sheet and rotating at the same time as it.

A l'aide de ce dispositif, ou d'autres dispositifs du même type par exemple fonctionnant avec un programme de guidage propre à chaque modèle de feuilles de verre à travailler, on-ne peut à chaque fois que traiter des feuilles de verre de la même forme et de la même taille et lors d'un changement de modèle de feuilles de verre, il faut soit changer le gabarit, soit remplacer le programme déterminant le trajet de l'outil par un autre programre.With the aid of this device, or of other devices of the same type, for example operating with a guidance program specific to each model of glass sheets to be worked, each time one can only treat glass sheets of the same shape and same size and when changing the glass sheet model, you must either change the template or replace the program determining the tool path by another program.

De plus, dans ces dispositifs connus, il faut positionner la feuille de verre de façon très précise.In addition, in these known devices, it is necessary to position the glass sheet very precisely.

Toutes ces contraintes limitent beaucoup l'utilisation de telles machines.All these constraints greatly limit the use of such machines.

L'invention a pour but de fournir une machine de traitement des bords de feuilles de verre, en particulier une machine de meulage n'ayant pas ces contraintes, en particulier une machine n'exigeant pas de gabarit ou de nouveau programme de commande lorsque le modèle de verre à travailler change.The object of the invention is to provide a machine for processing the edges of glass sheets, in particular a grinding machine which does not have these constraints, in particular a machine which does not require a template or a new control program when the glass model to work changes.

Selon l'invention pour positionner l'outil de travail par rapport à la feuille de verre, contrairement à l'art connu, aucun gabarit, aucun programme préétabli propre à chaque feuille de verre n'est nécessaire. La machine explore elle-même le contour de la feuille de verre et établit elle-même, après son exploration, un programme pour le pilotage de l'outil de travail. Les informations de trajet ou de posi- tien sont fournies à une mémoire seulement pour une portion de pourtour de la feuille de verre et extraites de la mémoire lorsqu'elles sont nécessaires. Les informations sont relevées par un organe palpeur mobile en direction de l'axe de rotation du plateau support du verre qui est situé en avant de l'outil de travail, c'est-à-dire qui explore les zones à travailler avant l'outil de travail, et décalé d'un angle donné (α, β) (alpba, bêta) par rapport à lui. Les signaux correspondant aux valeurs de position des points du bord de la feuille de verre sont entrés dans un registre à décalage et après traversée du registre au bout d'un tenps correspondant au tenps que met le plateau support pour tourner l'angle (α, β) (alpha, bêta) qui sépare les points de contact sur le bord du verre de l'organe palpeur et de l'outil de travail, sont exploités pour comnander un moteur qui positionne l'outil de travail. La mémoire contient temporairement toujours uniquement les informations de trajet correspondant à la section de trajet située entre l'organe palpeur et l'outil de travail.According to the invention to position the working tool relative to the glass sheet, unlike the known art, no template, no preset program specific to each glass sheet is necessary. The machine itself explores the outline of the glass sheet and establishes itself, after its exploration, a program for controlling the working tool. The path or location information is supplied to a memory only for a portion of the periphery of the glass sheet and extracted from the memory when necessary. The information is collected by a movable feeler in the direction of the axis of rotation of the glass support plate which is located in front of the working tool, that is to say which explores the areas to be worked before the work tool, and offset by a given angle (α, β) (alpba, beta) relative to it. The signals corresponding to the position values of the points of the edge of the glass sheet are entered into a shift register and after crossing the register after a tenps corresponding to the tenps that the support plate puts to turn the angle (α, β) (alpha, beta) which separates the contact points on the edge of the glass from the feeler member and the working tool, are used to control a motor which positions the working tool. The memory temporarily always only contains the path information corresponding to the path section located between the feeler member and the working tool.

L'invention permet non seulement de meuler successivement et dans n'inporte quel ordre des feuilles de verre de n'importe quelle forme, mais aussi de supprimer toutes les apérations contraignantes de positionnement précis des feuilles desverre. Ceci accroît considérable ment les possibilités d'utilisation de la machine à meuler et supprime les arrêts qui pour les machines antérieures étaient nécessaires à chaque changement de programme ou de gabarit. L'invention s'utilise principalement pour la commande d'une machine de meulage agissant sur les bords d'une feuille de verre, mais elle peut également être appliquée à la commande d'une autre machine agissant sur les bords d'un quelconque objet ou même sur la surface dudit objet, les zones de la surface étant repérées par rapport aux bords. Ainsi par exenple certains vitrages ont la périphérie de leur surface recouverte d'une bande conductrice de l'électricité, ou d'une bande décorative, des machines pilotées selon le prooédé de l'invention pourront avantageusement être employées pour déposer de telles bandes.The invention makes it possible not only to grind successively and in any order of the glass sheets of any shape, but also to remove all the constraining apertures of precise positioning of the glass sheets. This considerably increases the possibilities of using the grinding machine and eliminates the stops which for the previous machines were necessary at each change of program or template. The invention is mainly used mainly for the control of a grinding machine acting on the edges of a glass sheet, but it can also be applied to the control of another machine acting on the edges of any object or even on the surface of said object object, the areas of the surface being identified with respect to the edges. Thus, for example, certain glazing units have the periphery of their surface covered with an electrically conductive strip, or with a decorative strip, machines controlled according to the method of the invention may advantageously be used for depositing such strips.

Par ailleurs, il peut aussi s'avérer intéressant d'enregistrer simplement le programme de trajet ou de mesurer le contour de la feuille de verre. Ainsi, on peut par exemple, contrôler la forme de la feuille de verre en comparant les valeurs relevées par le dispositif de commande à des valeurs de référence stockées en mémoire.In addition, it can also be useful to simply record the trip program or measure the contour of the glass sheet. Thus, it is for example possible to check the shape of the glass sheet by comparing the values recorded by the control device with reference values stored in memory.

L'invention propose différents modes de réalisation de dispositifs permettant de mettre en oeuvre le procédé de pilotage décrit ci- dessus dans ses grandes lignes. Dans un premier mode de réalisation, l'outil de travail, en particulier un organe de meulage, et un organe palpeur peuvent être montés décalés d'un angle α (alpha) l'un par rapport à l'autre, chacun sur un chariot pouvant être déplacé de manié- re linéaire radialement par rapport à l'axe de rotation du plateau support du verre, et le chariot portant l'organe palpeur peut être pourvu d'un indicateur de trajet délivrant un signal électrique représentatif du trajet repéré, ledit signal étant entré dans le registre à décalage d'une mémoire, puis après une temporisation correspondant au temps de rotation de l'angle α (alpha) par le plateau support, dirigé sur un anplificateur puis sur le système de régulation du mécanisme d'entraînement du chariot portant l'outil de travail.The invention proposes different embodiments of devices making it possible to implement the piloting method described above in broad outline. In a first embodiment, the working tool, in particular a grinding member, and a feeler member can be mounted offset by an angle α (alpha) relative to each other, each on a carriage can be moved linearly radially with respect to the axis of rotation of the glass support plate, and the carriage carrying the feeler member can be provided with a path indicator delivering an electrical signal representative of the path identified, said signal having entered the shift register of a memory, then after a delay corresponding to the time of rotation of the angle α (alpha) by the support plate, directed on an amplifier then on the regulation system of the drive mechanism of the carriage carrying the working tool.

Dans un autre mode de réalisation, l'outil de travail est porté par un bras oscillant et se déplace sur un trajet circulaire, l'organe palpeur est porté par un scond bras oscillant décalé d'un angle β (bêta), les informations de trajet relevées par l'organe palpeur sont entrées dans une mémoire d'où elles sont extraites après un certain tenps de décalage pour commander le moteur de positionnement du bras portant l'outil de travail.In another embodiment, the working tool is carried by an oscillating arm and moves on a circular path, the feeler member is carried by a swing arm scond offset by an angle β (beta), the information of path noted by the feeler member are entered into a memory from which they are extracted after a certain time lag to control the positioning motor of the arm carrying the working tool.

Un moteur à couple constant agissant par l'intermédiaire d'un arbre sur le chariot portant l'organe palpeur assure une pression constante de l'organe palpeur dans le cas où celui-ci peut être déplacé de manière linéaire, ce moteur se chargeant également de faire avancer le galet palpeur d'une position de repos dans la position de travail et de la position de travail vers la position de repos.A constant torque motor acting by means of a shaft on the carriage carrying the feeler member ensures constant pressure of the feeler member in the event that it can be moved linearly, this engine also being loaded to advance the feeler roller from a rest position in the working position and from the working position to the rest position.

Dans le cas de l'organe palpeur monté sur un bras oscillant, un mateur à couple constant est aussi monté sur l'axe de pivotement du bras oscillant et assure une pression constante de l'organe palpeur ainsi que l'avancarnnt de cet organe palpeur vers la feuille de verre à travailler.In the case of the feeler member mounted on an oscillating arm, a constant torque dicer is also mounted on the pivot axis of the swinging arm and ensures constant pressure of the feeler member as well as the advancement of this feeler member towards the sheet of glass to be worked.

Par ailleurs, il est aussi avantageux que l'outil de travail soit pressé contre le bord de la feuille de verre par l'intermédiaire d'un moteur à couple constant avec une force constante ou réglable. Dans certains cas, la pression peut être modifiée pendant une opération de meulage à l'aide de ce moteur à couple constant, par exemple lors du passage autour de coins aigus.Furthermore, it is also advantageous for the working tool to be pressed against the edge of the glass sheet by means of a constant torque motor with a constant or adjustable force. In some cases, the pressure can be changed during a grinding operation using this constant torque motor, for example when passing around sharp corners.

En outre, lors d'un passage de l'outil de meulage sur un coin de la feuille de verre, on prévoit de moduler la vitesse de rotation du plateau support du verre. Pour cela, un générateur tachymétrique est relié à l'arbre du moteur de positionnement de l'outil, et les signaux qu'il émet en même tenps que les signaux issus de l'indicateur de trajet qui déterminent la position de l'outil, sont transmis à une unité d'exploitation dont le signal de sortie sert à la régulation de la vitesse du moteur d'entraînement en rotation du plateau support.In addition, when passing the grinding tool over a corner of the glass sheet, provision is made to modulate the speed of rotation of the glass support plate. For this, a tachometer generator is connected to the shaft of the tool positioning motor, and the signals it emits at the same time as the signals from the path indicator which determine the position of the tool, are transmitted to an operating unit whose output signal is used to regulate the speed of the drive motor in rotation of the support plate.

D'autres développements et avantages de l'invention seront décrits ci-après plus en détail en se référant aux dessins annexés dans lesquels :

  • - la figure 1 est une vue schématique d'une première forme d'exécution des parties essentielles d'une machine à meuler conforme à l'invention :
  • - la figure 2 illustre un équipage de meulage pour le dispositif représenté sur la figure 1 comportant un moteur à couple constant supplémentaire pour la régulation de la pression de meulage ;
  • - la figure 3 est un schéma de cablage d'un dispositif de ré- gulatim préprogrammable de la pression de meulage lors du passage autour des coins de la feuille de verre
  • - la figure 4 est une vue également schématique d'une deuxième forme d'exécution des parties essentielles d'une machine à meuler conforme à l'invention.
Other developments and advantages of the invention will be described below in more detail with reference to the accompanying drawings in which:
  • FIG. 1 is a schematic view of a first embodiment of the essential parts of a grinding machine according to the invention:
  • - Figure 2 illustrates a grinding equipment for the device shown in Figure 1 comprising an additional constant torque motor for regulating the grinding pressure;
  • - Figure 3 is a wiring diagram of a preprogrammable regulating device of the grinding pressure when passing around the corners of the glass sheet
  • - Figure 4 is a schematic view of a second embodiment of the essential parts of a grinding machine according to the invention.

Sur les figures, l'invention est illustrée sous la forme d'une machine à meuler les bords de feuilles de verre, bien qu'elle puisse s'appliquer également à d'autres machines.In the figures, the invention is illustrated in the form of a machine for grinding the edges of glass sheets, although it can also be applied to other machines.

La feuille de verre 1 à meuler est montée sur un plateau support tournant 2, par exemple à ventouse. Celui-ci est mû lentement en rotation par un moteur d'entraînement 3 pendant le meulage.The glass sheet 1 to be ground is mounted on a rotating support plate 2, for example with a suction cup. This is moved slowly in rotation by a drive motor 3 during grinding.

L'outil de meulage 6 est monté sur un chariot 7. Le chariot 7 se déplace radialement par rapport à l'axe du plateau tournant 2 sur des rails 8 non représentés sur la figure 1. Un galet palpeur 11 également monté sur un chariot 12 pouvant être déplacé radialement par rapport à l'axe du plateau tournant 2 est décalé d'un angle α (alpha) par rapport à la direction de déplacement de l'outil de meulage 6 dans le sens contraire à celui de la rotation du plateau tournant 2. Ce chariot 12 est aussi déplaçable sur des rails non représentés. Le chariot 12 portant le galet palpeur 11 peut être déplacé par l'intermédiaire d'une vis 14 actionnée par un moteur 16. Le moteur 16 est un moteur à couple constant qui maintient une pression constante du galet palpeur 11 contre la feuille de verre. Par l'action de ce moteur 16, on peut également éloigner le chariot 12 du plateau 2 pendant les périodes de repos.The grinding tool 6 is mounted on a carriage 7. The carriage 7 moves radially relative to the axis of the turntable 2 on rails 8 not shown in Figure 1. A feeler roller 11 also mounted on a carriage 12 can be moved radially relative to the axis of the turntable 2 is offset by an angle α (alpha) relative to the direction of movement of the grinding tool 6 in the opposite direction to that of the rotation of the turntable 2. This carriage 12 is also movable on rails not shown. The carriage 12 carrying the feeler roller 11 can be moved by means of a screw 14 actuated by a motor 16. The engine 16 is a constant torque motor which maintains a constant pressure of the feeler roller 11 against the glass sheet. By the action of this motor 16, the carriage 12 can also be moved away from the plate 2 during the rest periods.

Un générateur tachymétrique 13 est couplé à la vis 14 ou au moteur 16 en vue du contrôle de la vitesse de modification de position du galet palpeur 11. Les signaux issus du générateur tachymétrique 13 sont utilisés pour réguler la pression de l'outil de meulage 6 sur le verre et sont pour cela fournis au dispositif de déclenchement de mesure 95. Le galet palpeur 11 est mû en rotation par un moteur 15.A tachometer generator 13 is coupled to the screw 14 or to the motor 16 for controlling the speed of change of position of the feeler roller 11. The signals from the tachometer generator 13 are used to regulate the pressure of the grinding tool 6 on the glass and are therefore supplied to the measurement triggering device 95. The feeler roller 11 is rotated by a motor 15.

La position du chariot 12 portant le galet palpeur 11 est relevée par l'indicateur de trajet 18. L'indicateur de trajet 18 a la forme d'un contact glissant formant curseur qui se déplace le long d'une résistance 19 et qui prélève à cet endroit une tension électrique correspondant à la position du galet palpeur. Cette tension est amenée par l'intermédiaire de la ligne 20 au convertisseur analogique-numérique 21 dans lequel est formée une valeur numérique correspondante qui est introduite ensuite en mémoire dans le registre à décalage 22.The position of the carriage 12 carrying the feeler roller 11 is indicated by the path indicator 18. The path indicator 18 has the form of a sliding contact forming a cursor which moves along a resistor 19 and which takes an electric voltage corresponding to the position of the sensor roller. This voltage is brought via line 20 to the analog-digital converter 21 in which a corresponding digital value is formed which is then entered in memory in the shift register 22.

Le registre à décalage 22 peut faire partie d'un micro-ordinateur. Le registre à décalage 22 qui est cadencé par un générateur de signaux d'horloge 23, qui est également couplé à l'arbre d'entraînement 24 du plateau tournant 2, de sorte que la cadence de l'horloge dépend de la vitesse de rotation du plateau tournant 2. La sortie du registre à décalage 22 est connectée à l'entrée du convertisseur analogique 25 dont la sortie fournit une tension utilisée pour la commande de positionnement de l'outil de meulage.The shift register 22 can be part of a microcomputer. The shift register 22 which is clocked by a clock signal generator 23, which is also coupled to the drive shaft 24 of the turntable 2, so that the clock rate depends on the speed of rotation of the turntable 2. The output of the shift register 22 is connected to the input of the analog converter 25, the output of which provides a voltage used for positioning control of the grinding tool.

Le registre à décalage 22 est conçu de telle façon que la tension de consigne pour la commande de positiannement de l'outil apparaisse à la sortie du registre après un intervalle de temps égal au tenps mis par le plateau tournant 2 pour tourner de l'angle α (alpha) compris entre les deux directions radiales qui passent par le galet palpeur 11 d'une part et l'outil de meulage 6 d'autre part ; c'est-à-dire qu'après rotation du plateau 2 de l'angle α (alpha), l'outil de meulage 6 occupe par rapport au centre du plateau tournant 2 la position qu'occupait le galet palpeur 11 avant ladite rotation.The shift register 22 is designed such that the setpoint voltage for the tool positioning command appears at the output of the register after a time interval equal to the tenps set by the turntable 2 to turn by the angle α (alpha) between the two radial directions which pass by the feeler roller 11 on the one hand and the grinding tool 6 on the other hand; that is to say that after rotation of the plate 2 by the angle α (alpha), the grinding tool 6 occupies with respect to the center of the rotary plate 2 the position occupied by the feeler roller 11 before said rotation .

Le positionnement de l'outil de meulage 6 est assuré par un moteur 28 fixé au bâti de la machine, qui agit par l'intermédiaire de la vis 29 sur le chariot 7 portant l'outil de meulage 6. Ce moteur 28 est mis en action par l'anplificateur de régulation 31 par l'intermédiaire de la ligne 30.The positioning of the grinding tool 6 is ensured by a motor 28 fixed to the frame of the machine, which acts by means of the screw 29 on the carriage 7 carrying the grinding tool 6. This motor 28 is put in action by the regulating amplifier 31 via line 30.

Le chariot 7 portant l'outil de meulage 6 est également pourvu d'un indicateur de trajet 34 qui a la forme d'un contact glissant formant curseur qui se déplace le long de la résistance 35. La tension électrique prélevée par l'indicateur de trajet 34 est transmise à l'amplificateur de régulation 31 par l'intermédiaire de la ligne 36 à titre de valeur réelle de la position de l'outil de meulage.The carriage 7 carrying the grinding tool 6 is also provided with a path indicator 34 which has the form of a sliding contact forming a cursor which moves along the resistor 35. The electric voltage drawn by the indicator path 34 is transmitted to the control amplifier 31 via line 36 as the actual value of the position of the grinding tool.

L'indicateur de trajet 34 a encore une autre fonction. Il régit en effet, en liaison avec un générateur tachymétrique 38 couplé à l'arbre du moteur 28, le régime de rotation du moteur 3 entraînant le plateau tournant 2. Ce réglage de la vitesse de rotation du plateau tournant à pour but de maintenir constante la vitesse de meulage effective. Lors d'une modification de position de l'outil de meulage 6, au déplacement de la tête de meulage se superpose le mouvement de rotation de la feuille de verre 1, ce qui mène à une augmentation ou à une diminution indésirable de l'effet de meulage. Pour ccnpenser ces influences dues au système, on prévoit une modification de la vitesse de rotation du plateau tournant 2 en fonction de la position du chariot porte-outil et de la vitesse à laquelle la position du chariot porte-outil 7 se modifie, et à cet effet les tensions UT et Uw provenant d'une part du générateur tachymétrique 38 et d'autre part de l'indicateur de trajet 34 sont introduites dans l'unité électronique 39. La tension de sortie US de l'unité électronique 39 est fournie, à titre de tension de consigne, à l'amplificateur de régulation 40 qui régit la vitesse de rotation du moteur d'entraînement 3 par l'intermédiaire de la ligne 41. A l'arbre 24 du moteur d'entraînement 3 est en outre couplée un autre générateur tachymétrique 42 dont la tension de sortie correspond à la valeur réelle de rotation et est fournie à l'anplificateur de régulation 40 par l'intermédiaire de la ligne 43.The path indicator 34 has yet another function. It in fact governs, in conjunction with a tachometer generator 38 coupled to the motor shaft 28, the rotation speed of the motor 3 driving the turntable 2. The purpose of this adjustment of the speed of rotation of the turntable is to maintain constant the effective grinding speed. When changing the position of the grinding tool 6, the movement of the grinding head is superimposed on the rotational movement of the glass sheet 1, which leads to an undesirable increase or decrease in the effect grinding. To compensate for these influences due to the system, provision is made for a modification of the speed of rotation of the turntable 2 as a function of the position of the tool carriage and of the speed at which the position of the tool carriage 7 changes, and to this effect the voltages U T and U w coming on the one hand from the tachometric generator 38 and on the other hand from the path indicator 34 are introduced into the electronic unit 39. The output voltage U S from the electronic unit 39 is supplied, as a reference voltage, to the regulation amplifier 40 which governs the speed of rotation of the drive motor 3 via the line 41. To the shaft 24 of the drive motor 3 is also coupled another tachometer generator 42 whose output voltage corresponds to the actual value the rotation and is supplied to the regulating amplifier 40 via line 43.

Comme la figure 2 le montre en détail, entre le moteur de réglage 28 pour le chariot 7 et le chariot 7 proprement dit peut être intercalé un moteur à couple constant 45 qui maintient la pression de meulage de l'outil de meulage 6 constante ou la règle selon un programme pré-établi. Le réglage de la valeur de consigne souhaitée pour la pression de meulage s'effectue à l'aide du potentiomètre 46.As Figure 2 shows in detail, between the adjustment motor 28 for the carriage 7 and the carriage 7 itself can be interposed a constant torque motor 45 which keeps the grinding pressure of the grinding tool 6 constant or the rule according to a pre-established program. The desired setpoint for the grinding pressure is set using potentiometer 46.

La pression de meulage exercée par l'outil de meulage 6 sur le bord de la feuille de verre est mesurée sous la forme des deux composantes de pression à l'aide de deux capsules dynamométriques 47 et 48. A cet effet, l'outil de meulage 6, y compris le moteur d'entraînement de la meule, est monté sur une plaque de montage 49 qui, pour sa part, est reliée mécaniquement au chariot 7 par l'intermédiaire des capsules dynamométriques 47 et 48. La composante de force mesurée par la capsule dynamométrique 47 dépend de la position du bord de la feuille de verre et peut aussi bien prendre une valeur positive qu'une valeur négative car cette position du bord de la feuille de verre par rapport à la meule peut varier de manière continue. Les valeurs provenant des deux capsules dynamamétriques 47 et 48, converties en tensions électriques Ul et U2 sont introduites dans le calculateur 50 qui forme la somme géométrique Uist des deux valeurs Ul et U2. La tension Uist constitue la valeur réelle du circuit de régulation. Cette valeur réelle et la valeur de consigne réglée par le potentiomètre 46 sont fournies à l'amplificateur de régulation 51 qui fait fonctionner le moteur à couple constant 45.The grinding pressure exerted by the grinding tool 6 on the edge of the glass sheet is measured in the form of the two pressure components using two dynamometric capsules 47 and 48. For this purpose, the grinding 6, including the grinding wheel drive motor, is mounted on a mounting plate 49 which, for its part, is mechanically connected to the carriage 7 by means of the torque capsules 47 and 48. The force component measured by the dynamometric capsule 47 depends on the position of the edge of the glass sheet and can take both a positive and a negative value since this position of the edge of the glass sheet relative to the grinding wheel can vary continuously. The values coming from the two dynamametric capsules 47 and 48, converted into electrical voltages U l and U 2 are introduced into the computer 50 which forms the geometric sum Ui st of the two values U l and U 2 . The voltage U ist constitutes the actual value of the regulation circuit. This actual value and the set value set by the potentiometer 46 are supplied to the regulation amplifier 51 which operates the constant torque motor 45.

Comme mentionné plus haut, une régulation de la pression de meulage peut également s'effectuer suivant un programme pour tout le pourtour de la feuille de verre. La pression de meulage est alors diminuée à chaque coin de la feuille de verre 1 et est à nouveau accrue après traitement de ce coin. Dans ce cas, le potentiomètre 46 est remplacé par plusieurs potentiomètres qui sont mis en circuit ou hors circuit l'un à la suite de l'autre conformément au programme. Un circuit peur une telle programmation de la pression de meulage est illustré sur la figure 3.As mentioned above, regulation of the grinding pressure can also be carried out according to a program for the entire periphery of the glass sheet. The grinding pressure is then reduced at each corner of the glass sheet 1 and is increased again after treatment of this corner. In this case, the potentiometer 46 is replaced by several potentiometers which are switched on or off one after the other in accordance with the program. A circuit for such programming of the grinding pressure is illustrated in FIG. 3.

La programmation représentée est prévue pour une feuille de verre à plusieurs coins. Elle recourt essentiellement à un conpteur numérique de présélection 90 courant présentant 10 possibilités de présélection, grâce auquel on peut modifier la pression de meulage, en au maximum 5 coins, en particulier la diminuer, puis la rétablir à sa valeur normale après passage du coin. Le potentiomètre R1 sert à régler la pression normale, tandis que la pression à chaque coin de la feuille de verre est réglée dans l'ordre par les patentiomètres R2 à R6. La tension de commande est fournie à l'anplificateur de régulation 51 par l'intermédiaire de la ligne 91 et du contact Pl. Le potentiomètre R7 sert, lorsque tout le pourtour de la feuille de verre a été traité, c'est-à-dire au terme de l'opération de meulage, à supprimer la pression de meulage et à rétracter la tête de meulage dans sa position de départ. La tension de commande réglée au moyen du potentiomètre R7 est fournie à l'anplificateur de régulation 51 par l'intermédiaire du contact P2.The programming shown is intended for a sheet of glass with several corners. It essentially uses a current digital preselection sensor 90 presenting 10 preselection possibilities, thanks to which the grinding pressure can be modified, in maximum 5 corners, in particular decrease it, then restore it to its normal value after passing the corner. The potentiometer R1 is used to adjust the normal pressure, while the pressure at each corner of the glass sheet is adjusted in order by the patentiometers R2 to R6. The control voltage is supplied to the regulating amplifier 51 via the line 91 and the contact Pl. The potentiometer R7 is used, when the entire periphery of the glass sheet has been processed, that is to say say at the end of the grinding operation, to remove the grinding pressure and to retract the grinding head to its starting position. The control voltage adjusted by means of potentiometer R7 is supplied to the regulation amplifier 51 via contact P2.

Les signaux de commande pour la modification de la pression de meulage au niveau des coins sont fournis par la machine tachymétrique 13. En effet, lorsque le galet palpeur 11 palpe un coin de la feuille de verre, ceci se traduit par une valeur de tension déterminée et par un changement de polarité de la tension. Ce signal formé d'une valeur de tension et du changement de polarité de la tension est utilisé comme un signal de commande pour l'activation du compteur de présélection 90. Etant donné que la pression de meulage ne doit être modifiée que pour des angles relativement aigus, le signal provenant de la machine tachymétrique 13 est tout d'abord transmis à un dispositif de déclenchement de mesure 95. A l'aide du potentiomètre 96, le point de commutation souhaité est réglé par ce dispositif de déclenchement de mesure 95, c'est-à-dire qu'il est établi à partir de quel seuil une modification de la pression de meulage doit être effectuée. Si la machine tachymétrique 13 signale un coin qui provoque l'activation du disposi tif de déclenchement 95, le relais dl est actionné pendant un court laps de temps. Le relais d2 est excité par le relais dl et se maintient alors spontanément. Le relais d2 alimente en même temps le compteur numérique de présélection 90, qui à ce moment est encore à zéro, au moyen des impulsions qui proviennent du générateur 23 pilotant le registre à décalage 22 et couplé à l'arbre 24 du plateau tournant 2. Le compteur de présélection 90 est programmé de telle façon qu'après la rotation de la feuille de verre de l'angle α (alpha), le relais Zl fonctionne. Ce relais Zl assure que le patentiomètre R2 fournit à ce moment la valeur de la consigne tandis que précédemment, cette valeur de consigne était fournie par le potentiomètre Rl. La présélection détermine pour quels - angles de rotation du plateau de support 2 le potentiomètre R2 reste enclenché. Lorsque le relais Z2 est activé, la tension de commande est ramenée sur le potentiomètre R1 et le circuit vers le dispositif d'effacement d3 est simultanément interronpu. Ceci fait déclencher le relais d2 ; par conséquent, le "timer" du compteur est interrompu et le ccnpteur de présélection est ainsi maintenu.The control signals for modifying the grinding pressure at the corners are supplied by the tachometer machine 13. In fact, when the feeler roller 11 feels a corner of the glass sheet, this results in a determined tension value and by a change in polarity of the voltage. This signal formed by a voltage value and the change in polarity of the voltage is used as a control signal for the activation of the preselection counter 90. Since the grinding pressure must only be modified for relatively angles treble, the signal from the tachometer machine 13 is first transmitted to a measurement trigger device 95. With the potentiometer 96, the desired switching point is set by this measurement trigger device 95, c that is, it is established from which threshold a modification of the grinding pressure must be carried out. If the tachometer machine 13 signals a corner which causes the activation of the trip device 95, the relay dl is actuated for a short period of time. Relay d2 is energized by relay dl and is then maintained spontaneously. The relay d2 simultaneously supplies the digital preset counter 90, which at this time is still zero, by means of the pulses which come from the generator 23 driving the shift register 22 and coupled to the shaft 24 of the turntable 2. The preset counter 90 is programmed in such a way that after the rotation of the glass sheet by the angle α (alpha), the relay Z1 operates. This relay Zl ensures that the patentiometer R2 supplies the setpoint value at this time while previously, this setpoint was supplied by the potentiometer R1. The preselection determines for which - rotation angles of the support plate 2 the potentiometer R2 remains triggered. When the relay Z2 is activated, the control voltage is brought back to the potentiometer R1 and the circuit to the erasing device d3 is simultaneously interrupted. This triggers relay d2; therefore, the counter "timer" is interrupted and the preselection counter is thus maintained.

Si la machine tachymétrique 13 détermine ensuite le second point critique, le relais d2 est à nouveau fermé et l'opération décrite précédemment se répète, cette fois cependant par l'intermédiaire des relais de présélection Z3 et Z4. Pour les coins suivants, l'opération décrite se répète à nouveau. Pour le troisième coin ce sont les relais de présélection Z5 et Z6 qui sont sollicités, au cas où la feuille de verre présente un quatrième et un cinquième coin, cette opération se répète encore par l'intermédiaire des relais de présélection Z7 et Z8 et respectivement Z9 et Z10. De cette façon, il est possible de régler la pression de meulage à une valeur souhaitée pour au maximum 5 coins, de façon indépendante pour chacun d'eux, c'est-à-dire que chaque coin peut être traité au moyen d'une pression de meulage différente de celle appliquée lors. du meulage des autres coins. Au terme de l'opération de meulage, le compteur numérique de présélection 90 est ramené à zéro par l'intermédiaire de l'entrée d'effacement 98.If the tachometer machine 13 then determines the second critical point, the relay d2 is again closed and the operation described above is repeated, this time however via the preselection relays Z3 and Z4. For the following corners, the described operation is repeated again. For the third corner it is the preselection relays Z5 and Z6 which are requested, in case the glass sheet has a fourth and a fifth corner, this operation is repeated again by means of the preselection relays Z7 and Z8 and respectively Z9 and Z10. In this way it is possible to set the grinding pressure to a desired value for a maximum of 5 corners, independently for each of them, i.e. each corner can be treated by means of a grinding pressure different from that applied during. grinding of other corners. At the end of the grinding operation, the digital preset counter 90 is reset to zero via the erasing input 98.

Le mode de fonctionnement de la machine à meuler représentée est le suivant. Le galet palpeur 11 et l'outil de meulage 6 se trouvent tout d'abord dans une position de repos rétractée. Dans cette position de repos du galet palpeur et de l'outil de meulage, la feuille de verre 1 est posée sur le plateau support 2 par exenple à ventouse. Dès que le plateau support est raccordé à la dépression, la feuille de verre est maintenue et le cycle peut être enclenché. Au moment de l'enclenchement, le plateau tournant 2 se met en mouvement. La vitesse de rotation du moteur d'entraînement 3 étant déterminée par l'indicateur de trajet 34, en fonction de la position de la tête de meulage 6, cette vitesse est une vitesse fixe définie à l'avance.The operating mode of the grinding machine shown is as follows. The feeler roller 11 and the grinding tool 6 are first of all in a retracted rest position. In this rest position of the feeler roller and the grinding tool, the glass sheet 1 is placed on the support plate 2 by suction cup example. As soon as the support plate is connected to the vacuum, the glass sheet is maintained and the cycle can be started. At the moment of engagement, the turntable 2 starts to move. The speed of rotation of the drive motor 3 being determined by the path indicator 34, as a function of the position of the grinding head 6, this speed is a fixed speed defined in advance.

Le moteur 16 est mis sous tension, grâce à quoi le chariot 12 et le galet palpeur 11 se déplacent en direction de la feuille de verre jusqu'à ce que le galet palpeur 11 s'applique contre le bord de la feuille de verre 1 sous la pression déterminée par le moteur 16 fonctionnant comme un moteur à couple constant. Dès que le chariot 12 s'est immobilisé, le dispositif de régulation électronique s'enclenche, ce qui fait débuter l'opération de meulage proprement dite. Le chariot 7 avec l'outil de meulage 6 est réglé décalé de l'angle α (alpha) par rapport au galet palpeur et l'ensemble se déplace le long de la feuille de verre en maintenant le décalage initial. Le système de régulation, y compris la régulation de la pression de la meule fonctionne alors came décrit précédemment.The motor 16 is energized, whereby the carriage 12 and the feeler roller 11 move in the direction of the glass sheet until the feeler roller 11 is pressed against the edge of the glass sheet 1 under the pressure determined by the motor 16 operating as a constant torque motor. As soon as the carriage 12 has come to a standstill, the electronic regulation device engages, which starts the grinding operation proper. The carriage 7 with the grinding tool 6 is adjusted offset from the angle α (alpha) by relative to the feeler roller and the assembly moves along the glass sheet while maintaining the initial offset. The regulation system, including the regulation of the pressure of the grinding wheel then operates cam described previously.

La figure 4 illustre une autre forme d'exécution du disposi tif conforme à l'invention qui se distingue de la forme d'exécution décrite plus haut par le fait que la tête de palpage et l'outil de meulage ne sont pas montés sur des chariots pouvant être déplacés de manière linéaire, mais chacun sur un bras oscillant pouvant pivoter, de sorte qu'ils sont chacun guidés suivant un trajet circulaire. La struc- ture et le mode de fonctionnement de cette forme d'exécution sont tels que décrits ci-après.FIG. 4 illustrates another embodiment of the device according to the invention which differs from the embodiment described above by the fact that the probe head and the grinding tool are not mounted on carriages that can be moved linearly, but each on an oscillating arm that can pivot, so that they are each guided along a circular path. The structural t ure and the mode of operation of this embodiment are as described below.

La feuille de verre 1 à meuler est à nouveau montée sur un plateau tournant à ventouse 2 qui est mû en rotation par un moteur d'entraînement 53. L'outil de meulage 56 est monté à l'extrémité d'un bras oscillant 57 qui peut pivoter autour de l'axe de rotation 58. Le pivotement du bras oscillant 57 est obtenu par le moteur 59 qui détermine la position angulaire ε (epsilon) du bras oscillant 57 et ainsi la position de l'outil de meulage 56. Sur le bras oscillant 57 agit en outre le moteur à couple constant 60 disposé concentriquement à l'axe de rotation 58 qui, indépendamment de la position angulaire du bras oscillant 57 assure une pression de meulage constante ou, comme décrit précedemrent, avec référence à la figure 3, une pression de meulage réglée le cas échéant selon un programτe.The glass sheet 1 to be ground is again mounted on a rotary table with suction cup 2 which is rotated by a drive motor 53. The grinding tool 56 is mounted at the end of an oscillating arm 57 which can pivot around the axis of rotation 58. The pivoting of the swinging arm 57 is obtained by the motor 59 which determines the angular position ε (epsilon) of the swinging arm 57 and thus the position of the grinding tool 56. On the swing arm 57 acts in addition the constant torque motor 60 disposed concentrically with the axis of rotation 58 which, independently of the angular position of the swing arm 57 ensures constant grinding pressure or, as described above, with reference to FIG. 3 , a grinding pressure adjusted if necessary according to a program.

Un second bras oscillant 63 est monté sur l'axe de rotation 64 et est décalé par rapport au premier de l'angle β (beta), c'est-à-dire, dans le cas représenté, de 180° dans le sens de la rotation du plateau tournant 2. Le bras oscillant 63 a la même longueur que le bras oscillant 57 et porte le galet palpeur 65 a son extrémité externe. Un moteur 66 indépendant entaîne le galet palpeur 65 et maintient les pertes par friction aussi faibles que possible. Le moteur à couple constant 67 agissant sur le bras oscillant 63 assure, d'une part, que le galet palpeur 65 soit pressé contre le bord de la feuille de verre tcu- jours avec une force constante et sert, d'autre part, après l'exécution du palpage, à ramener le bras oscillant 63 dans sa position de repos, ou avant le début de l'opération de meulage, c'est-à-dire après la pose . de la feuille de verre 1, sur le plateau à ventouse 2, à amener le galet palpeur 65 contre le bord de la feuille.A second swing arm 63 is mounted on the axis of rotation 64 and is offset from the first by the angle β (beta), that is to say in the case shown, by 180 ° in the direction of the rotation of the turntable 2. The swing arm 63 has the same length as the swing arm 57 and carries the feeler roller 65 at its outer end. An independent motor 66 drives the feeler roller 65 and keeps the friction losses as low as possible. The constant torque motor 67 acting on the oscillating arm 63 ensures, on the one hand, that the feeler roller 65 is pressed against the edge of the glass sheet every day with constant force and, on the other hand, serves after performing the probing, to return the swinging arm 63 to its rest position, or before the start of the grinding operation, that is to say after installation. of the glass sheet 1, on the suction plate 2, to bring the feeler roller 65 against the edge of the sheet.

La position du galet palpeur 65, c'est-à-dire la valeur de l'angle de pivotement γ (gamma) est établie par l'indicateur d'angle 68 couplé également à l'axe de rotation 64 du bras oscillant 63. L'indicateur d'angle 68 fournit un signal correspondant à l'angle γ (gamma) sous la forme d'une tension continue qui est convertie en une valeur numérique correspondante dans le convertisseur analogique-numérique 71. Le signal digitalisé est alors fourni au registre à décalage 72 qui est cadencé par le générateur de signaux d'horloge 74 couplé à l'arbre d'entraînement 73 du plateau tournant 2 et qui est agencé de telle façon que les valeurs introduites dans le registre à décalage 72 apparaissent à la sortie du registre à décalage après un intervalle de tenps dans lequel le plateau tournant 2 a tourné de l'angle β (beta), c'est-à-dire dans le cas de figure représenté de 180°. A partir du registre à décalage 72, qui peut aussi faire partie d'un micro-ordinateur, les signaux sont amenés au convertisseur numérique-analogique 75 et la valeur de tension analogique apparaissant à la sortie de ce convertisseur 75 sert de tension de consigne pour l'amplificateur de régulation 76 qui commande le moteur de réglage 59 pour le bras oscillant 57 par l'intermédiaire de la ligne 77. L'indicateur d'angle 82 couplé à l'axe 58 du bras oscillant 57 fournit la valeur réelle de la position angulaire ε (epsilon) du bras oscillant 57 qui sert de rétrosignal de la valeur réelle fournie par l'intermédiaire de la ligne 79 à l'anplificateur de régulation 76.The position of the feeler roller 65, i.e. the value of the pivot angle γ (gamma) is established by the angle indicator 68 also coupled to the axis of rotation 64 of the swing arm 63. The angle indicator 68 provides a signal corresponding to the angle γ ( gamma) in the form of a direct voltage which is converted into a corresponding digital value in the analog-digital converter 71. The digitized signal is then supplied to the shift register 72 which is clocked by the clock signal generator 74 coupled to the drive shaft 73 of the turntable 2 and which is arranged so that the values entered in the shift register 72 appear at the output of the shift register after a tenps interval in which the turntable 2 has rotated of the angle β (beta), that is to say in the illustrated case of 180 °. From the shift register 72, which can also be part of a microcomputer, the signals are fed to the digital-analog converter 75 and the analog voltage value appearing at the output of this converter 75 serves as a reference voltage for the regulation amplifier 76 which controls the adjustment motor 59 for the swing arm 57 via the line 77. The angle indicator 82 coupled to the axis 58 of the swing arm 57 provides the actual value of the angular position ε (epsilon) of the swinging arm 57 which serves as a feedback of the real value supplied via the line 79 to the regulating amplifier 76.

Pour compenser l'influence exercée par la position de la partie traitée du bord de la feuille de verre sur la vitesse de meulage effective, le régime du moteur 53 du plateau tournant est à nouveau réglé en fonction de la position angulaire du bras oscillant 57 et de sa vitesse de pivotement. A cet effet, d'une part, la tension UW de l'indicateur d'angle 82 et, d'autre part, la tension UT de la machine tachymétrique 80 couplée à l'arbre 58 du bras oscillant 57 sont combinées dans le conposant électronique 84 de telle sorte que la tension de sortie US de ce composant électronique 84 soit fournie à l'amplificateur de régulation 85 à titre de tension de consigne pour le régime du moteur 53. La valeur réelle de régime provenant de la machine tachymétrique 78 est amenée par l'intermédiaire de la ligne 86 à l'amplificateur de régulation 85.To compensate for the influence exerted by the position of the treated part of the edge of the glass sheet on the effective grinding speed, the speed of the motor 53 of the turntable is again adjusted as a function of the angular position of the swing arm 57 and of its pivoting speed. For this purpose, on the one hand, the voltage U W of the angle indicator 82 and, on the other hand, the voltage U T of the tachometer machine 80 coupled to the shaft 58 of the swing arm 57 are combined in the electronic component 84 so that the output voltage U S of this electronic component 84 is supplied to the control amplifier 85 as a reference voltage for the engine speed 53. The real speed value coming from the machine Tachometer 78 is brought via line 86 to the regulation amplifier 85.

Dans cette forme d'exécution également, il peut être prévu de régler la pression de meulage effective, qui dépend à nouveau de la position spatiale du bord de la feuille de verre, sur une valeur constante ou d'après un programme pré-établi. A cet effet, la valeur de consigne de la pression de meulage est réglée par le potentiomètre 81 ou selon un programme donné pré-établi, comme décrit précédemment en référence à la figure 3, et est fournie à l'amplificateur de régulation 87 pour le moteur à couple constant 60. L'outil de meulage 56 lui-même est monté sur le bras oscillant 57 avec intercalation de deux capsules dynamométriques 88, 89 qui fournissent au calculateur 92 la grandeur des deux composantes de la force de pression de meulage effective sous la forme de tensions électriques positives ou négatives. Le calculateur 92 forme la somme géométrique des deux valeurs de tension et la tension résultante est fournie à l'anplificateur de régulation 87 à titre de valeur réelle du circuit de régulation.Also in this embodiment, provision may be made for adjusting the effective grinding pressure, which again depends on the spatial position of the edge of the glass sheet, to a constant value or according to a preset program. For this purpose, the value of setpoint of the grinding pressure is adjusted by the potentiometer 81 or according to a given preset program, as described previously with reference to FIG. 3, and is supplied to the regulation amplifier 87 for the constant torque motor 60. L the grinding tool 56 itself is mounted on the swinging arm 57 with the insertion of two dynamometric capsules 88, 89 which supply the computer 92 with the magnitude of the two components of the effective grinding pressure force in the form of positive electrical voltages or negative. The computer 92 forms the geometric sum of the two voltage values and the resulting voltage is supplied to the regulation amplifier 87 as the actual value of the regulation circuit.

Claims (14)

1. Procédé pour le positionnement d'un outil destiné au travail des bords ou de régions de la surface repérables par rapport aux bords d'une feuille de verre montée sur un plateau support tournant autour d'un axe, selon lequel l'outil de travail déplaçable en direction de l'axe du plateau de support est soumis à un guidage forcé le long des bords de la feuille de verre à travailler, caractérisé en ce que le programme de pilotage de l'outil de travail est déterminé par un organe palpeur qui peut se déplacer également. en direction de l'axe de rota- tien du plateau support, qui est décalé d'un angle donné (α, β) en avant de l'outil de travail et qui suit les bords de la feuille de verre, les informations recueillies par l'organe palpeur étant stockées dans un registre à décalage, utilisées après un intervalle de temps correspondant au temps de rotation de l'angle (α, β) entre le point de contact de l'organe palpeur et le point de contact de l'outil de travail pour la commande du moteur déterminant la position de l'outil de travail.1. Method for positioning a tool intended for working the edges or regions of the surface which can be identified with respect to the edges of a glass sheet mounted on a support plate rotating about an axis, according to which the work movable in the direction of the axis of the support plate is subjected to forced guidance along the edges of the glass sheet to be worked, characterized in that the control program of the working tool is determined by a feeler member which can also move. towards the axis of rotation of the support plate, which is offset by a given angle (α, β) in front of the working tool and which follows the edges of the glass sheet, the information gathered by the feeler member being stored in a shift register, used after a time interval corresponding to the time of rotation of the angle (α, β) between the contact point of the feeler member and the contact point of the work tool for motor control determining the position of the work tool. 2. Dispositif pour la mise en oeuvre du procédé selon la revendication 1, comportant un plateau support (2) pour la feuille de verre (1) à travailler présentant un mécanisme d'entraînement en rotation autour d'un axe et un outil de travail pouvant être déplacé de manière linéaire en direction de l'axe de rotation du plateau support, caractérisé en ce que l'outil de travail (6) et un organe de palpage (11) sont montés chacun sur un chariot (12 ou 7) pouvant être déplacé de manière linéaire radialement vers l'axe de rotation du plateau support (2), les chariots étant décalés l'un par rapport à l'autre d'un angle α, le chariot (12) portant l'organe palpeur (11) étant pourvu d'un indicateur de trajet électrique (18, 19) et le chariot (7) portant l'outil de travail (6) étant pourvu d'un mécanisme d'entraînement à moteur (28), l'indicateur de trajet (18, 19) étant relié à un anplificateur de régulation (31) agissant sur le moteur (28) du mécanisme du chariot (7) portant l'outil de travail (6) par l'intermédiaire d'un registre à décalage (22) pour la fourniture des signaux de commande temporisés d'une manière correspondant au temps de parcours de l'angle de rotation α.2. Device for implementing the method according to claim 1, comprising a support plate (2) for the glass sheet (1) to be worked having a drive mechanism in rotation around an axis and a working tool which can be moved linearly in the direction of the axis of rotation of the support plate, characterized in that the working tool (6) and a feeler member (11) are each mounted on a carriage (12 or 7) which can be moved linearly radially towards the axis of rotation of the support plate (2), the carriages being offset relative to each other by an angle α, the carriage (12) carrying the feeler member (11 ) being provided with an electric path indicator (18, 19) and the carriage (7) carrying the working tool (6) being provided with a motor drive mechanism (28), the path indicator (18, 19) being connected to a regulating amplifier (31) acting on the motor (28) of the carriage mechanism (7) carrying the working tool (6 ) via a shift register (22) for supplying the control signals timed in a manner corresponding to the travel time of the angle of rotation α. 3. Dispositif pour l'exécution du procédé suivant la revendication 1 comportant un plateau support (2) pourvu d'un mécanisme d'entraînement en rotation (53) autour d'un axe pour la feuille de verre à travailler et un outil de travail (56) pouvant se déplacer suivant un trajet circulaire et monté sur un bras oscillant, caractérisé en ce qu'un organe palpeur (65) est monté sur un second bras oscillant (63) dont l'axe de rotation est décalé d'un angle g par rapport à l'axe de rotation (58) du premier bras oscillant (57), le bras oscillant 63 portant l'organe palpeur (65) étant pourvu d'un indicateur d'angle électrique (68) tandis que le bras oscillant (57) portant l'outil de traitement (56) est pourvu d'un moteur (59) déterminant la position an- glulaire du bras oscillant (57), l'indicateur d'angle électrique (68) du bras oscillant (63) portant l'organe palpeur (65) étant relié à un anplificateur de régulation (76) agissant sur le moteur (59) du bras oscillant (57) qui porte l'outil de traitement (56) par l'intermédiaire d'un registre à décalage (72) pour la fourniture des signaux de commande temporises d'une manière correspondant au temps de parcours de l'angle de rotation β.3. Device for carrying out the method according to claim 1 comprising a support plate (2) provided with a rotary drive mechanism (53) about an axis for the glass sheet to be worked and a working tool (56) able to move according to a circular path and mounted on an oscillating arm, characterized in that a feeler member (65) is mounted on a second oscillating arm (63) whose axis of rotation is offset by an angle g relative to the axis of rotation (58) of the first swing arm (57), the swing arm 63 carrying the feeler member (65) being provided with an electric angle indicator (68) while the swing arm (57) carrying the tool treatment (56) is provided with a motor (59) determining the angular position of the swing arm (57), the electric angle indicator (68) of the swing arm (63) carrying the feeler member (65 ) being connected to a regulating amplifier (76) acting on the motor (59) of the swinging arm (57) which carries the treatment tool (56) via a shift register (72) for supplying control signals timed in a manner corresponding to the travel time of the angle of rotation β. 4. Dispositif suivant la revendication 2 ou 3, caractérisé en ce que l'indicateur de trajet (18, 19) ou l'indicateur d'angle (68) actionné par l'organe palpeur (ll, 65) est un générateur de signaux numériques.4. Device according to claim 2 or 3, characterized in that the path indicator (18, 19) or the angle indicator (68) actuated by the feeler member (ll, 65) is a signal generator digital. 5. Dispositif suivant la revendication 2 ou 3, caractérisé en ce que l'indicateur d'angle (68) actionné par l'organe palpeur (11, 65) comprend un générateur de signaux analogiques qui indique l'emplacement de l'organe palpeur (11, 65) par une tension électrique amenée par l'intermédiaire d'un convertisseur analogique-numérique sous une forme digitalisée au registre à décalage (22, 72)..5. Device according to claim 2 or 3, characterized in that the angle indicator (68) actuated by the feeler member (11, 65) comprises an analog signal generator which indicates the location of the feeler member (11, 65) by an electric voltage supplied via an analog-digital converter in a digitized form to the shift register (22, 72). 6. Dispositif suivant l'une quelconque des revendications 2 à 5, caractérisé en ce que le chariot (7) portant l'outil de traitement (6) ou le bras osciliant (57) portant l'outil de travail (56) est pourvu d'un indicateur de trajet (34, 35) ou d'un indicateur d'angle (68) indiquant la valeur réelle de la position de l'outil, les signaux de ces indicateurs étant fournis à l'amplificateur de régulation (31, 76).6. Device according to any one of claims 2 to 5, characterized in that the carriage (7) carrying the treatment tool (6) or the oscillating arm (57) carrying the working tool (56) is provided a path indicator (34, 35) or an angle indicator (68) indicating the actual value of the position of the tool, the signals of these indicators being supplied to the regulation amplifier (31, 76). 7. Dispositif suivant l'une quelconque des revendications 2 à 6, caractérisé en ce que pour obtenir une pression constante de l'organe de palpage (11, 65) un moteur à couple constant (16, 67) agissant sur le chariot (7) portant l'organe de palpage ou sur le bras oscillant (63) portant l'organe de palpage (65) est prévu.7. Device according to any one of claims 2 to 6, characterized in that to obtain a constant pressure of the feeler member (11, 65) a constant torque motor (16, 67) acting on the carriage (7 ) carrying the feeler member or on the oscillating arm (63) carrying the feeler member (65) is provided. 8. Dispositif suivant l'une quelconque des revendications 2 à 7, caractérisé en ce qu'entre le moteur (28, 59) de l'outil de travail (6, 56) et le chariot porte-outil (7) ou le bras oscillant (57) est intercalé un moteur à couple constant (45, 60) réglant la pression de l'outil de travail (6, 56).8. Device according to any one of claims 2 to 7, characterized in that between the motor (28, 59) of the working tool (6, 56) and the tool-carrying carriage (7) or the arm oscillating (57) is interposed a constant torque motor (45, 60) regulating the pressure of the working tool (6, 56). 9. Dispositif suivant la revendication 8, caractérisé en ce que la valeur réelle de la pression de l'outil de travail est mesurée par au moins une capsule dynamométrique (47, 48, 88, 89) intercalée entre l'outil de travail et le porte-outil (49) ou le bras oscillant (57), dont les signaux de sortie sont fournis à l'amplificateur de régulation (51,87) activant le moteur à couple constant (45, 60).9. Device according to claim 8, characterized in that the real value of the pressure of the working tool is measured by at least one dynamometric capsule (47, 48, 88, 89) interposed between the working tool and the tool holder (49) or the swing arm (57), the output signals of which are supplied to the control amplifier (51, 87) activating the constant torque motor (45, 60). 10. Dispositif suivant l'une quelconque des revendications 2 à 9, caractérisé en ce qu'une machine tachymétrique (38 ou 80) est connectée au moteur (28) du chariot porte-outil (7) ou à l'axe de rotation (58) du bras oscillant (57) portant l'outil, les signaux de cette machine étant fournis en même tenps que les signaux provenant de l'indicateur de trajet (34, 35) ou de l'indicateur d'angle (82) à une unité d'exploitation (39, 84) dont le signal de sortie active un anplificateur de régulation (40, 85) pour le moteur d'entraînement en rotation (3, 53) du plateau support (2).10. Device according to any one of claims 2 to 9, characterized in that a tachometer machine (38 or 80) is connected to the motor (28) of the tool holder carriage (7) or to the axis of rotation ( 58) of the swing arm (57) carrying the tool, the signals from this machine being supplied in the same tenps as the signals from the path indicator (34, 35) or the angle indicator (82) to an operating unit (39, 84), the output signal of which activates a regulating amplifier (40, 85) for the rotary drive motor (3, 53) of the support plate (2). 11. Dispositif suivant l'une quelconque des revendications 2 à 10, caractérisé en ce que l'organe de palpage (11, 65) a la forme d'un galet palpeur roulant sur le bord de la feuille de verre.11. Device according to any one of claims 2 to 10, characterized in that the feeler member (11, 65) has the shape of a feeler roller rolling on the edge of the glass sheet. 12. Dispositif suivant la revendication 11, caractérisé en ce que le galet palpeur (65) est entraîné.12. Device according to claim 11, characterized in that the feeler roller (65) is driven. 13. Dispositif suivant l'une quelconque des revendications 2 à 12, caractérisé en ce que l'outil de travail (6, 56) est une tête de meulage servant à meuler les bords de la feuille de verre (1).13. Device according to any one of claims 2 to 12, characterized in that the working tool (6, 56) is a grinding head used for grinding the edges of the glass sheet (1). 14. Dispositif suivant l'une quelconque des revendications 2 à 12, caractérisé en ce que l'outil de travail (6, 56) est un outil servant à appliquer une peinture ou une pâte conductrice électrique sous la forme d'un ruban sur les bords où sur la zone marginale de la feuille de verre (1) adjacente à ces bords.14. Device according to any one of claims 2 to 12, characterized in that the working tool (6, 56) is a tool used to apply an electrically conductive paint or paste in the form of a tape on the edges where on the marginal zone of the glass sheet (1) adjacent to these edges.
EP83400131A 1982-01-20 1983-01-19 Procedure and devices for positioning a machine for treating the edges of plassplates Withdrawn EP0084506A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3201495 1982-01-20
DE3201495 1982-01-20

Publications (2)

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EP0084506A2 true EP0084506A2 (en) 1983-07-27
EP0084506A3 EP0084506A3 (en) 1984-12-12

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EP83400131A Withdrawn EP0084506A3 (en) 1982-01-20 1983-01-19 Procedure and devices for positioning a machine for treating the edges of plassplates

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US (1) US4528780A (en)
EP (1) EP0084506A3 (en)
JP (1) JPS58171251A (en)
BR (1) BR8300267A (en)
CA (1) CA1207063A (en)
DK (1) DK14583A (en)
ES (1) ES8308739A1 (en)
PT (1) PT76115B (en)

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EP0661135A1 (en) * 1993-12-30 1995-07-05 DELLE VEDOVE LEVIGATRICI SpA Method to hone curved and shaped profiles and honing machine to carry out such method

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FR2877249B1 (en) * 2004-10-28 2007-01-05 Xavier Carriou GRINDING PROCESS FOR THE RETOUCHING OF PRE-SIZED GLASSES
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CN102695584B (en) * 2010-04-08 2015-02-18 李赛克奥地利有限公司 Arrangement for guiding tools
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CN115870840B (en) * 2023-02-24 2023-06-27 四川炬原玄武岩纤维科技有限公司 Driving and controlling method of basalt reinforced plastic plate forming edge trimming device
CN116572112B (en) * 2023-07-14 2023-09-12 盐城市大丰区礼盛新材料科技有限公司 Tracking type special-shaped glass edging device

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US4648210A (en) * 1984-06-30 1987-03-10 Saint-Gobain Vitrage Apparatus for controlling position of grinding tool
EP0168311A3 (en) * 1984-06-30 1987-12-09 Saint-Gobain Vitrage Grinding machine with control circuit for positioning the tool carriage
EP0661135A1 (en) * 1993-12-30 1995-07-05 DELLE VEDOVE LEVIGATRICI SpA Method to hone curved and shaped profiles and honing machine to carry out such method

Also Published As

Publication number Publication date
JPS58171251A (en) 1983-10-07
PT76115B (en) 1985-11-13
BR8300267A (en) 1983-10-25
CA1207063A (en) 1986-07-02
PT76115A (en) 1983-02-01
ES519117A0 (en) 1983-10-16
US4528780A (en) 1985-07-16
ES8308739A1 (en) 1983-10-16
DK14583A (en) 1983-07-21
EP0084506A3 (en) 1984-12-12
DK14583D0 (en) 1983-01-14

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