EP0689899A1 - Vorrichtung zum Schleifen von Glasscheiben - Google Patents

Vorrichtung zum Schleifen von Glasscheiben Download PDF

Info

Publication number
EP0689899A1
EP0689899A1 EP95109960A EP95109960A EP0689899A1 EP 0689899 A1 EP0689899 A1 EP 0689899A1 EP 95109960 A EP95109960 A EP 95109960A EP 95109960 A EP95109960 A EP 95109960A EP 0689899 A1 EP0689899 A1 EP 0689899A1
Authority
EP
European Patent Office
Prior art keywords
grinding
head
chamber
shut
assembly according
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Withdrawn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
EP95109960A
Other languages
English (en)
French (fr)
Inventor
Alessandro Bergia
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.)
Bottero SpA
Original Assignee
Bottero SpA
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 Bottero SpA filed Critical Bottero SpA
Publication of EP0689899A1 publication Critical patent/EP0689899A1/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/08—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving liquid or pneumatic means
    • 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
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/20—Drives or gearings; Equipment therefor relating to feed movement
    • 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
    • B24B9/102—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 travelling sheets

Definitions

  • the present invention relates to an assembly for grinding sheets of glass.
  • the invention may be applied particularly, though not exclusively, in the field of polishing semi-finished sheets of glass and the following description will refer explicitly thereto, without thereby limiting the generality of the invention.
  • the glass industry currently uses plants which, in most cases, comprise grinding equipment which in turn includes a conveyor for advancing a succession of sheets of glass along a grinding path, a plurality of fixed grinding wheels arranged along the path for rough grinding and finishing the sheets, and one or more polishing assemblies also arranged along the grinding path for polishing the surfaces worked by the fixed grinding wheels.
  • grinding equipment which in turn includes a conveyor for advancing a succession of sheets of glass along a grinding path, a plurality of fixed grinding wheels arranged along the path for rough grinding and finishing the sheets, and one or more polishing assemblies also arranged along the grinding path for polishing the surfaces worked by the fixed grinding wheels.
  • each of the polishing assemblies includes a grinding head with a respective grinding wheel and equipment for driving and controlling the grinding head which in turn includes a pneumatic linear actuator for moving the grinding head towards and away from a sheet to be worked and a pneumatic circuit for controlling the linear actuator itself.
  • prior art grinding equipment includes a brake for each polishing assembly, the brake having a pad of high-friction material urged against the associated head by resilient elements, usually springs, so as to clamp the head in the said waiting position.
  • the brake is disengaged pneumatically and the pad is held in a rest position spaced from the associated grinding head.
  • each of these assembles the respective head is driven by a pneumatic actuator which is not normally able to urge the grinder against the sheet with the desired degree of constancy or, therefore, the desired contact pressure between the grinder and the sheet being worked.
  • the actuator in order to avoid discontinuous or jerky movements of the grinding heads, the actuator must be supplied with a greater pressure than is required to provide the desired contact pressure between the grinding head and the sheet being worked.
  • the actuator again due to the compressibility of air, is unable to resist changes in the characteristics of the cutting forces acting mutually between the grinding head and the sheet, with the result that the grinding head is made to oscillate in the direction of movement of the head itself; naturally the finish of the polished surface and the geometry of the surface depend on the frequency and amplitude of this oscillation and, in many cases, the surface of the sheet is wavy.
  • Each of these assemblies also has a brake which is activated by resilient elements and the braking action varies in dependence on the degree of wear of its moving parts and on variations in the resilience of the resilient elements themselves.
  • the object of the present invention is to provide an assembly for grinding sheets of glass which provides a simple solution to the problems outlined above and is at the same time both easy and inexpensive to produce.
  • the present invention provides as assembly for grinding sheets of glass which includes at least one grinding head and equipment for driving and controlling this head, the drive equipment including a linear actuator coupled to the grinding head for moving it towards and away from a working position and means for activating the actuator, characterised in that the actuator is a hydropneumatic actuator including a piston connected to the grinding head, a first variable-volume chamber for compressed air and a second variable-volume chamber for containing a quantity of pressurised oil which acts on the piston in use to advance the grinding head into its advanced working position; the activating means including means for supplying pressurised oil, a duct connecting the supply means to the second chamber, shut-off means arranged in the duct, and control means for displacing the shut-off means between a first operative position, in which the shut-off means disconnect the second chamber hydraulically from the supply means, and a second operative position in which the shut-off means enable oil to flow freely through the duct.
  • the actuator is a hydropneumatic actuator including a piston connected to the grinding head,
  • the equipment 1 includes a support framework 3, a known conveyor 4 connected to the framework 3 for advancing a succession of sheets 2 of glass, standing on their edges, along a rectilinear grinding path 5, a first plurality of fixed grinding wheels, known and therefore not shown, arranged along the path 5, and a second plurality of polishing assemblies 6 also arranged along the path 5 for polishing the surfaces of sheets 2 ground by the fixed wheels (not shown).
  • the conveyor 4 includes two endless belts 7 which pass around a pair of motor-driven rollers 8 carried by the framework 3 with respective delivery passes facing each other and parallel both to each other and to the path 5.
  • each assembly 6 includes a grinding head 9 located beneath the conveyor 4 and in turn including an electric motor 10, and a grinding wheel 11 keyed to the output shaft of the electric motor 10.
  • the grinding head 9 can include, in addition to the electric motor 10, a reduction gear assembly, for example of the belt type, the input shaft of which is connected in known manner to the output shaft of the motor 10 and the output shaft of which is keyed to the grinding wheel 11.
  • Each assembly 6 also includes a guide and slide unit 12 for guiding the head 9 towards and away from a sheet to be polished in a substantially vertical direction 13, and equipment 14 for driving and controlling the head 9.
  • the equipment 14 includes a hydropneumatic linear actuator which in turn comprises a cylinder 16 and a piston head 17 which is securely fixed to the respective grinding head 9 by its rod 18 and is housed in the cylinder 16 which it divides internally into two variable-volume chambers, indicated 20 and 21.
  • the equipment 14 also includes a system 15a for activating the actuator 15 which comprises in turn an hydraulic circuit 22.
  • the circuit 22 includes a reservoir 23 of pressurised oil, a duct 24 connecting the reservoir 23 to the chamber 21 and a monostable, oleodynamic slide valve 25 connected into the duct 24, this being of the two-way, two-position type which is normally closed.
  • the valve 25 is an obturator valve with two working positions. When in a first working position, specifically in its closed position, the valve 25 completely closes the duct 24 and isolates the chamber 21 hydraulically from the tank 23 while in its second working position, that is open, it allows oil to flow through the duct 24.
  • the circuit 22 includes a regulable throttle 26 arranged, in the embodiment described, in a portion of the duct 24 between the chamber 21 and the valve 25 and operable, in use, to reduce the section of the duct 24 and, together with the actuator 15 and that portion of the duct between the actuator 15 and the throttle 26, to define an adjustable damper for the head 9.
  • the system 15a further includes a pneumatic circuit 27 connected to a known source 28 of compressed air for enabling the chamber 20 and the tank 23 to be pressurised in use and for controlling the valve 25.
  • the circuit 27 includes a first line or branch 29 connecting the tank 23 to the source 28 and including a valve 30 for regulating the pressure in the tank 23 and, as a result, the force with which the grinding wheel 11 is urged against the sheets 2 to be polished.
  • the circuit 27 also includes a three-way, two position bistable pneumatic valve 31 which can be operated, in this example manually by an operator, to move the grinding wheel 11 away from the path 5 of advance of the sheets 2.
  • the inlet of the valve 31 is connected to the source 28 while its outlet is connected both to the chamber 20 and to a first inlet of a known "OR" element 32 the outlet of which is connected to the valve 25 to control the opening of the valve 25 itself.
  • the circuit 27 includes a further monostable, three-way, pneumatic valve 33 with two working positions, an inlet of which is connected to the source 28 and an outlet of which is connected to a second inlet of the "OR" element 32.
  • the valve 33 can be switched by an associated known electric actuator 33a, itself controlled by a known control unit 33b, to cause the slide of the valve 33 to move in response to a presence signal transmitted in known manner to the control unit 33b from a sensor 34 arranged, preferably along the path 5, to detect the presence of a sheet 2 to be worked near the associated grinding wheel 11.
  • the sensor 34 detects the presence of this sheet 2 and sends a presence signal to the control unit 33b which in turn activates the actuator 33a which, in response, switches the valve 33.
  • the switching of the valve 33 causes a pressure signal to be sent to the element 32 and the immediate switching of the valve 25 to its open position, in which it is maintained.
  • the chamber 21 communicates directly with the pressurised reservoir 23 and the oil which flows into the chamber 21 moves the piston 17 and thereby urges the wheel 11 against the sheet 2 which has, in the meantime, reached a position opposite this wheel, with a predetermined substantially constant force which can be regulated by variation of the pressure in the reservoir 23 by means of the regulating valve 30.
  • the head 9 can be moved into its withdrawn, rest position by manual operation of the valve 31.
  • a control signal is sent to the "OR" element 32 which switches the valve 25 to its open position if it is closed, so that the chamber 20 is pressurised and causes the piston 17 to withdraw so that the grinding wheel 11 is moved away from the grinding path 5.
  • the variant illustrated in Figure 3 relates to a polishing assembly 36 which is similar to the assembly 6 and has parts indicated, where possible, by the same reference members as those of the corresponding parts of the assembly 6.
  • the assembly 36 is particularly suitable for use in cases where the grinding wheel 11 is arranged at a level above the surface of the sheet 2 to be worked and below the motor 10 whereby, if it were not controlled, the head 9 would move axially towards the path 5 under its own weight.
  • the assembly 36 can also be used to advantage to drive and control rough- finishing wheels and, more generally, in all cases in which the grinding head 9 needs to be held constantly in the same working position.
  • the assembly 36 differs from the assembly 6 in that, in the circuit 27, the valve 33 is replaced by a monostable, five-way, two-position, valve 37 having an inlet connected to a first inlet of the "OR" element 32, the second inlet of which is connected to the outlet of the valve 31.
  • the valve 37 also has a second outlet connected to a first inlet of an additional known “OR” element 38, arranged between the valve 31 and the chamber 20, as well as a second inlet also connected to the outlet of the valve 31 itself.
  • the assembly 36 also differs from the assembly 6 in that it includes an absorption sensor 39 arranged in a supply line for the motor 10 for detecting the power absorbed by the motor 10, this sensor being connected electrically to the control unit 33b.
  • the assembly 36 In use, if the grinding head 9 is a polishing head, the assembly 36 operates in the manner described for the assembly 6, the only difference being that, when the valve 25 is switched to its closed position, the valve 37 pressurises the chamber 20 through the element 38.
  • the piston 17 is held in a fixed axial position by the oil trapped in the chamber 21 and by the action of the compressed air in the chamber 20, whereby the head 9 remains perfectly static despite the axial force exerted on the head by its own weight.
  • the head 9 is either a rough-grinding, semi-finishing or finishing head, that is, in general a grinding head that must be held in a strictly fixed working position relative to the path 5, during a step of setting the position of the assembly 36, the valve 37 is controlled by the control unit 33b to displace the valve 25 into its open position to move the grinding head 9 into its working position. Once in this position, the valve 37 once again switches the valve 25 into its closed position thereby restoring the first condition described, with the piston 17 held in an axially fixed position and the head 9 held in its working position; the sheets 2 are then advanced in succession to be ground by the head 9.
  • the sensor 39 and the control unit 33b control the valve 37 and thus the valve 25 so as to compensate for wear of the head 9.
  • the sensor 39 detects the magnitude of the current taken, or absorbed, by the motor 10 and sends the unit 33b a signal proportional to this value.
  • the control unit 33b in a block 42, compares the absorption value detected with a lower threshold value memorised in the block 42 corresponding to an acceptable limit of wear of the head 9 and, when the value detected becomes equal to this lower threshold value, that is, the head 9 has reached this acceptable wear limit, the control unit 33b activates the actuator 33a and switches the valve 25 to its open position by means of the valve 37.
  • the switching of the valve 25 causes oil to flow from the reservoir 23 into the chamber 21, thereby moving the grinding head 9 towards the path 5.
  • the sensor 39 continues to send a signal proportional to the value of current absorbed by the motor 10 to the control unit 33b which compares this detected value with an upper threshold signal, again memorised in the block 42, and, when the detected signal reaches the upper threshold value, activates the actuator 33a to switch the valve 25 back to its closed position.
  • the head is moved progressively towards the path 5 during the working of the sheets 2 so as to compensate for wear of the head 9 itself.
  • each assembly 6, 36 enables its grinding wheel 11 to be kept constantly in the same position relative to the sheets 2, or to the path 5, since the positioning means consist of a hydraulic fluid which is virtually incompressible and is thus able to provide a substantially rigid fixed stop for the head 9 when this is in its waiting/working position.
  • each assembly 6, 36 this is achieved by means of a hydropneumatic control system designed so that the pressure between the surface of the wheel 11 and the sheet 2 being worked can be adjusted extremely accurately and the pressure set can be kept constant despite the gradual wear of the wheel 11 itself.
  • the characteristics of the hydropneumatic system enable it to counter any variation in the mutually-acting cutting forces between the wheel 11 and the sheet 2 in use in an effective and regulable manner.
  • valves 25, 31, 33 and 37 can be replaced by valves of other types while each assembly 6, 36 may include more than one grinding head 9 and each head 9 may be controlled by more than one linear actuator 15.
  • the unit 12 in the assemblies 6, 36 can be replaced by a different guide system which enables the position of the direction 13 along which the head 9 is movable relative to the sheet 2 to be worked to be adjusted.
  • control unit 33b of the assemblies 6, 36 may be connected to a control unit (not shown) of the equipment 1 so as to make the latter fully automatic.
  • heads 9 of the assemblies 6, 36 described can be fitted with wheels of any type, including ones for rough-grinding, semi-finishing and finishing of the sheets 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
EP95109960A 1994-06-28 1995-06-26 Vorrichtung zum Schleifen von Glasscheiben Withdrawn EP0689899A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT94TO000531A IT1266734B1 (it) 1994-06-28 1994-06-28 Gruppo per la molatura di lastre di vetro.
ITTO940531 1994-06-28

Publications (1)

Publication Number Publication Date
EP0689899A1 true EP0689899A1 (de) 1996-01-03

Family

ID=11412631

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95109960A Withdrawn EP0689899A1 (de) 1994-06-28 1995-06-26 Vorrichtung zum Schleifen von Glasscheiben

Country Status (2)

Country Link
EP (1) EP0689899A1 (de)
IT (1) IT1266734B1 (de)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1063053A2 (de) * 1999-06-21 2000-12-27 Z. BAVELLONI S.p.A. Doppelseitige Kantenschleifmaschine für glas- oder steinartiges Flachmaterial und desgleichen
EP1197295A2 (de) * 2000-10-06 2002-04-17 BOTTERO S.p.A. Verfahren zum Nachstellen der Schleifscheibe an einer Flachglasschleifmaschine, und Maschine zur Anwendung solch eines Verfahrens
EP1219387A2 (de) * 2000-12-22 2002-07-03 BOTTERO S.p.A. Verfahren und Vorrichtung zum Entfernen der Beschichtung einer beschichtete Glasplatte
EP1468784A2 (de) * 2003-04-16 2004-10-20 Forvet S.r.l. Schleifkopf für eine Glasplattenschleifmaschine und mit solch einem Schleifkopf ausgerüstete Schleifmaschine
EP2039463A1 (de) * 2007-09-19 2009-03-25 C.M.B. Costruzioni Meccaniche Besana S.p.A. Automatisches Schleifscheibeneinstellungssystem, insbesondere für Glasschleifmaschinen
CN102225534A (zh) * 2011-04-19 2011-10-26 清华大学 用于控制修整器的气动控制回路和修整设备
CN102729114A (zh) * 2012-06-14 2012-10-17 张家港市恒久玻璃机械有限公司 可供小玻璃用的加工机器以及加工方法
CN102729119A (zh) * 2012-06-14 2012-10-17 张家港市恒久玻璃机械有限公司 玻璃开槽机
ITMI20111244A1 (it) * 2011-07-05 2013-01-06 Glaston Italy S P A Dispositivo di avanzamento per macchine operatrici a controllo numerico, particolarmente per la lavorazione dei bordi di lastre di vetro.
ITMI20112076A1 (it) * 2011-11-15 2013-05-16 Comandulli Costruzioni Meccaniche S R L Macchina per la lavorazione di coste di lastre
IT201900001427A1 (it) * 2019-01-31 2020-07-31 Bottero Spa Metodo per la molatura e la lucidatura di lastre di vetro
IT201900002941A1 (it) * 2019-02-28 2020-08-28 Bottero Spa Macchina e unita' di molatura e lucidatura di una lastra di vetro
IT201900002925A1 (it) * 2019-02-28 2020-08-28 Bottero Spa Metodo e gruppo di molatura e lucidatura di uno spigolo di una lastra di vetro
IT201900003001A1 (it) * 2019-03-01 2020-09-01 Soltek S R L Macchina per la rettifica di elementi lastriformi e relativo metodo
IT201900004559A1 (it) * 2019-03-27 2020-09-27 Neptun S R L Procedimento e dispositivo di misurazione automatica di utensili, particolarmente per macchine molatrici per la lavorazione del vetro.
IT201900010563A1 (it) * 2019-07-01 2021-01-01 Alfa Impianti Soc A Responsabilita Limitata Semplificata Rettificatrice e metodo di controllo della stessa
IT202000000829A1 (it) * 2020-01-17 2021-07-17 Italvision S R L Sistema di rettifica per macchine squadratrici, macchina squadratrice e relativo metodo di controllo

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2091125A5 (de) * 1970-05-04 1972-01-14 Libbey Owens Ford Glass Co
FR2199277A5 (de) * 1972-09-09 1974-04-05 Rautenstrauch Martin
FR2413181A1 (fr) * 1977-12-29 1979-07-27 Clichy Const Sa Perfectionnement aux machines a rectifier comportant des commandes hydrauliques
GB2021993A (en) * 1978-06-01 1979-12-12 Breda Termomeccanica Spa Apparatus for machining joints
US4375141A (en) * 1980-07-09 1983-03-01 Hoyne Industries, Inc. Beveling apparatus
FR2522568A1 (fr) * 1982-03-04 1983-09-09 Sack Glastech Machine a meuler le verre
US5146715A (en) * 1989-11-30 1992-09-15 Bando Kiko Co., Ltd. Apparatus for grinding a peripheral edge of a glass sheet

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2091125A5 (de) * 1970-05-04 1972-01-14 Libbey Owens Ford Glass Co
FR2199277A5 (de) * 1972-09-09 1974-04-05 Rautenstrauch Martin
FR2413181A1 (fr) * 1977-12-29 1979-07-27 Clichy Const Sa Perfectionnement aux machines a rectifier comportant des commandes hydrauliques
GB2021993A (en) * 1978-06-01 1979-12-12 Breda Termomeccanica Spa Apparatus for machining joints
US4375141A (en) * 1980-07-09 1983-03-01 Hoyne Industries, Inc. Beveling apparatus
FR2522568A1 (fr) * 1982-03-04 1983-09-09 Sack Glastech Machine a meuler le verre
US5146715A (en) * 1989-11-30 1992-09-15 Bando Kiko Co., Ltd. Apparatus for grinding a peripheral edge of a glass sheet

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1063053A3 (de) * 1999-06-21 2002-01-30 Z. BAVELLONI S.p.A. Doppelseitige Kantenschleifmaschine für glas- oder steinartiges Flachmaterial und desgleichen
EP1063053A2 (de) * 1999-06-21 2000-12-27 Z. BAVELLONI S.p.A. Doppelseitige Kantenschleifmaschine für glas- oder steinartiges Flachmaterial und desgleichen
US6416382B1 (en) 1999-06-21 2002-07-09 Z. Bavelloni S.P.A. Bilateral automatic machine for edge-machining plates of glass, stone-like materials and the like
EP1197295A3 (de) * 2000-10-06 2002-08-21 BOTTERO S.p.A. Verfahren zum Nachstellen der Schleifscheibe an einer Flachglasschleifmaschine, und Maschine zur Anwendung solch eines Verfahrens
EP1197295A2 (de) * 2000-10-06 2002-04-17 BOTTERO S.p.A. Verfahren zum Nachstellen der Schleifscheibe an einer Flachglasschleifmaschine, und Maschine zur Anwendung solch eines Verfahrens
EP1219387A3 (de) * 2000-12-22 2003-01-15 BOTTERO S.p.A. Verfahren und Vorrichtung zum Entfernen der Beschichtung einer beschichtete Glasplatte
EP1219387A2 (de) * 2000-12-22 2002-07-03 BOTTERO S.p.A. Verfahren und Vorrichtung zum Entfernen der Beschichtung einer beschichtete Glasplatte
EP1468784A2 (de) * 2003-04-16 2004-10-20 Forvet S.r.l. Schleifkopf für eine Glasplattenschleifmaschine und mit solch einem Schleifkopf ausgerüstete Schleifmaschine
EP1468784A3 (de) * 2003-04-16 2005-05-11 Forvet S.r.l. Schleifkopf für eine Glasplattenschleifmaschine und mit solch einem Schleifkopf ausgerüstete Schleifmaschine
EP2039463A1 (de) * 2007-09-19 2009-03-25 C.M.B. Costruzioni Meccaniche Besana S.p.A. Automatisches Schleifscheibeneinstellungssystem, insbesondere für Glasschleifmaschinen
CN102225534A (zh) * 2011-04-19 2011-10-26 清华大学 用于控制修整器的气动控制回路和修整设备
CN102225534B (zh) * 2011-04-19 2015-06-24 清华大学 用于控制修整器的气动控制回路和修整设备
ITMI20111244A1 (it) * 2011-07-05 2013-01-06 Glaston Italy S P A Dispositivo di avanzamento per macchine operatrici a controllo numerico, particolarmente per la lavorazione dei bordi di lastre di vetro.
ITMI20112076A1 (it) * 2011-11-15 2013-05-16 Comandulli Costruzioni Meccaniche S R L Macchina per la lavorazione di coste di lastre
WO2013072845A1 (en) * 2011-11-15 2013-05-23 Comandulli Costruzioni Meccaniche S.R.L. A machine for working slab edges
CN102729119A (zh) * 2012-06-14 2012-10-17 张家港市恒久玻璃机械有限公司 玻璃开槽机
CN102729114A (zh) * 2012-06-14 2012-10-17 张家港市恒久玻璃机械有限公司 可供小玻璃用的加工机器以及加工方法
IT201900001427A1 (it) * 2019-01-31 2020-07-31 Bottero Spa Metodo per la molatura e la lucidatura di lastre di vetro
EP3689542A1 (de) * 2019-01-31 2020-08-05 Bottero S.p.A. Verfahren zum schleifen und polieren von glasscheiben
EP3702103A1 (de) * 2019-02-28 2020-09-02 Bottero S.p.A. Verfahren und anordnung zum schleifen und polieren einer ecke einer glasscheibe
IT201900002925A1 (it) * 2019-02-28 2020-08-28 Bottero Spa Metodo e gruppo di molatura e lucidatura di uno spigolo di una lastra di vetro
IT201900002941A1 (it) * 2019-02-28 2020-08-28 Bottero Spa Macchina e unita' di molatura e lucidatura di una lastra di vetro
EP3702102A1 (de) * 2019-02-28 2020-09-02 Bottero S.p.A. Maschine und einheit zum schleifen und polieren einer glasscheibe
IT201900003001A1 (it) * 2019-03-01 2020-09-01 Soltek S R L Macchina per la rettifica di elementi lastriformi e relativo metodo
WO2020178675A1 (en) * 2019-03-01 2020-09-10 Soltek S.R.L. Machine for grinding sheet-like elements and relative method
IT201900004559A1 (it) * 2019-03-27 2020-09-27 Neptun S R L Procedimento e dispositivo di misurazione automatica di utensili, particolarmente per macchine molatrici per la lavorazione del vetro.
EP3715052A1 (de) * 2019-03-27 2020-09-30 Neptun S.r.l. Verfahren und vorrichtung zur automatischen messung von werkzeugen, insbesondere von schleifmaschinen für die glasbearbeitung
IT201900010563A1 (it) * 2019-07-01 2021-01-01 Alfa Impianti Soc A Responsabilita Limitata Semplificata Rettificatrice e metodo di controllo della stessa
IT202000000829A1 (it) * 2020-01-17 2021-07-17 Italvision S R L Sistema di rettifica per macchine squadratrici, macchina squadratrice e relativo metodo di controllo
EP3851246A1 (de) * 2020-01-17 2021-07-21 Italvision - S.R.L. Ein gleichrichtersystem fur quadratiermaschinen, quadriermaschine und steuerungsmethode davon

Also Published As

Publication number Publication date
ITTO940531A0 (it) 1994-06-28
IT1266734B1 (it) 1997-01-14
ITTO940531A1 (it) 1995-12-28

Similar Documents

Publication Publication Date Title
EP0689899A1 (de) Vorrichtung zum Schleifen von Glasscheiben
US4720939A (en) Wide belt sander cleaning device
US3374583A (en) Apparatus for finishing surfaces
KR940011126A (ko) 도장막연마방법 및 그 장치
CA2491800A1 (en) Method and apparatus for grinding a rotating roller with an elastic staedy
US3877180A (en) Drive systems for a grinding wheel
DK151572B (da) Styreanlaeg til et skinneslibeapparat til udlagte jernbaneskinner
US4841675A (en) Apparatus for cleaning and polishing roll assemblies
EP3702103B1 (de) Verfahren und anordnung zum schleifen und polieren einer ecke einer glasscheibe
JPH0561071B2 (de)
US2778163A (en) Valve grinding machine
DE869608C (de) Auf einem Gleis fahrbare, zum Schienenschleifen bestimmte Einrichtung
US2419940A (en) Grinding machine
US2775235A (en) Booster for template controlled truing mechanism
US2826008A (en) Locating abrasive wheels for dressing
GB837262A (en) Apparatus for the automatic setting of the trueing tools for the grinding discs of spring-end grinding machines
US3898771A (en) Grinding machine
US2648172A (en) Grinding machine
US2968136A (en) Grinding machine assemblies
US2720063A (en) Multiple wheel grinding machine
US2674831A (en) Grinding machine
EP0472948A1 (de) Werkzeugkopf für eine Glasschneidemaschine
US3606701A (en) Sectioning machines comprising means controlling the movements of the cutting tool
US3316679A (en) Centerless grinding machine
US2824949A (en) Hydraulic control device for resistance seam-welding machines

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT DE ES FR GB

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19960704