EP1197295A2 - Verfahren zum Nachstellen der Schleifscheibe an einer Flachglasschleifmaschine, und Maschine zur Anwendung solch eines Verfahrens - Google Patents

Verfahren zum Nachstellen der Schleifscheibe an einer Flachglasschleifmaschine, und Maschine zur Anwendung solch eines Verfahrens Download PDF

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Publication number
EP1197295A2
EP1197295A2 EP01123903A EP01123903A EP1197295A2 EP 1197295 A2 EP1197295 A2 EP 1197295A2 EP 01123903 A EP01123903 A EP 01123903A EP 01123903 A EP01123903 A EP 01123903A EP 1197295 A2 EP1197295 A2 EP 1197295A2
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EP
European Patent Office
Prior art keywords
grinding wheel
machine
abrasive surface
reference means
grinding
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Withdrawn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
EP01123903A
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English (en)
French (fr)
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EP1197295A3 (de
Inventor
Salvatore Cantoro
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 EP1197295A2 publication Critical patent/EP1197295A2/de
Publication of EP1197295A3 publication Critical patent/EP1197295A3/de
Withdrawn legal-status Critical Current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
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/20—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground
    • B24B7/22—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding inorganic material, e.g. stone, ceramics, porcelain
    • B24B7/24—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding inorganic material, e.g. stone, ceramics, porcelain for grinding or polishing glass
    • 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
    • B24B49/18—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 taking regard of the presence of dressing tools
    • B24B49/183—Wear compensation without the presence of dressing tools

Definitions

  • the present invention relates to a machine for grinding sheets of glass.
  • grinding machines which comprise, for each side of the work sheet, a number of side by side grinding heads, each comprising a powered grinding wheel set to a respective zero position to remove a respective quantity of material to form beveled sheets or sheets to a given size or shape.
  • each wheel is normally fitted to a respective slide in turn fitted to the machine frame, and which is activated by a supervisor who, on detecting any deviation in size, shape and/or surface finish of the sheet coming off the machine, adjusts the wheels until the sheets coming off the machine are restored to the desired characteristics.
  • the above method of checking and adjusting the wheels fails to provide for obtaining sheets all of the same shape, size and surface finish.
  • the reason for this substantially lies in the zero position adjustment depending on the skill and experience of the supervisor, who, knowing the expected working life of the wheel under normal working conditions, and by constantly checking the characteristics of the finished sheets, manually adjusts the position of one or more wheels accordingly.
  • the adjustment is made, however, there is no guarantee that each wheel is actually set to the ideal work position, even if the sheets coming off the machine are, at least initially, within the given tolerance range, so that one or more wheels subjected to greater stress may undergo sudden, rapid wear, while others are subjected to less severe stress than expected.
  • a method of taking up wear of a grinding wheel on a machine for grinding sheets of glass comprising the steps of setting an abrasive surface of the grinding wheel to an ideal work position, such as to obtain a sheet of desired characteristics; and adjusting the position of the grinding wheel to restore said abrasive surface to said ideal work position following wear of the grinding wheel; characterized in that adjustment of the position of the grinding wheel comprises the steps of moving said abrasive surface towards reference means on said machine, positioned facing and a predetermined distance from said abrasive surface when the abrasive surface is in said ideal work position; determining the instant of interference between said abrasive surface and said reference means; arresting said grinding wheel at said instant of interference; and moving said abrasive surface away from said reference means to an adjustment distance at least equal to said predetermined distance.
  • the present invention also relates to a machine for grinding sheets of glass.
  • a machine for working sheets of glass comprising a supporting frame; a grinding wheel defined by an abrasive surface; actuating means for setting and maintaining said abrasive surface in an ideal work position such as to obtain a sheet of desired characteristics; and adjusting means for adjusting the position of the grinding wheel with respect to said supporting frame, and restoring said abrasive surface to said ideal work position following wear of the grinding wheel; characterized in that said adjusting means comprise reference means fitted to said supporting frame and facing and a predetermined distance from said abrasive surface when the abrasive surface is in said ideal work position; first actuating means for moving said abrasive surface towards said reference means; detecting means for determining the instant of interference between said abrasive surface and said reference means; stop means for arresting said grinding wheel at the instant of interference; and second actuating means for moving said abrasive surface away from said reference means and to an adjustment distance at least equal to said predetermined distance.
  • Number 1 in Figure 1 indicates as a whole a machine (shown partly) for grinding a sheet 2 of glass having a lateral surface 3 for grinding and placed horizontally on a known supporting device 4 of machine 1.
  • Machine 1 comprises a frame 5; and a number of adjustable grinding heads 6, only one of which is shown in Figure 1.
  • Each head 6 comprises a grinding wheel 7, which is housed inside a sealed chamber 8 containing cutting fluid, is rotated about a respective axis 9 - in this case, a horizontal axis - by a respective electric motor 10, and is defined by an abrasive face surface 12, in this case, perpendicular to axis 9 and parallel to surface 3.
  • Motor 10 is located outside chamber 8 and is supported, together with grinding wheel 7, by a respective slide 13, which is fitted movably to frame 5 and is moved, with respect to frame 5 and in a direction 15 parallel to axis 9, by a respective, conveniently step-type, motor 16 fitted in known manner to frame 5 and connected to slide 13 by a known screw-nut screw assembly 17 (not described in detail) to move respective grinding wheel 7 to and from supporting device 4 under the control of a central control unit 18 comprising a memory 19 for storing a number of values, each corresponding to a reference or zero axial position of slide 13.
  • motor 16, assembly 17 and slide 13 form part of a positioning and adjusting assembly 20 for regulating the position of grinding wheel 7 in direction 15 as a function of the wear of grinding wheel 7.
  • Each assembly 20 also comprises an adjustable detecting device 21 in turn comprising a fastening frame 22 connected integrally to frame 5 of machine 1 on one side, and supporting, on the other side, a tubular body 23 having an axis 24 parallel to axis 9, and connected integrally to frame 22 to the side of respective grinding head 6.
  • Each device 21 comprises a rod 25, which has an intermediate portion 26 extending inside tubular body 23, and is connected to tubular body 23 in axially-sliding, angularly-fixed manner.
  • Each rod 25 also comprises two opposite lateral portions 27 and 28.
  • Portion 27 projects frontwards on the same side as and alongside grinding wheel 7, projects inside chamber 8 and beyond the plane of abrasive surface 12 of grinding wheel 7, and terminates with an eccentric plate 30.
  • Plate 30 extends partly facing abrasive surface 12, and is defined by a flat surface 31 extending, in this case, over sheet 2, facing and parallel to surface 12, and withdrawn with respect to surface 3.
  • Portion 28 projects from tubular body 23 on the same side as motor 10 and inside a cup-shaped body 33 coaxial with axis 24 and comprising a cylindrical lateral wall 34 defining an extension of tubular body 23, and an end wall 35 having an inner shoulder 36 ( Figure 2).
  • a supporting body 37 is located between shoulder 36 and the end of portion 28, is connected integrally to portion 28, and projects radially beyond portion 28 to define a support for one end of a forcing spring 39 surrounding portion 28, and the opposite end of which rests on a retaining ring 40 engaged in sliding manner by rod 25 and gripped between tubular body 23 and lateral wall 34 of cup-shaped body 33.
  • device 21 also comprises a screw 42 coaxial with axis 24, the head of which projects outside cup-shaped body 33, and the threaded shank 43 of which engages a threaded hole in end wall 35, and rests against supporting body 37 to keep supporting body 37 and plate 30 in a given axial reference position.
  • Device 21 also comprises an angular stop screw 44, the shank of which engages a threaded hole in supporting body 37 and projects outwards of cup-shaped body 33 through an axial slot 45 which it engages in axially sliding manner.
  • device 21 also comprises a switch 47, which is fitted integrally to a lateral wall of the tubular body, is connected electrically to central control unit 18, and has a switching member 48 on which acts an arm 49 connected integrally to portion 27 of rod 25 and extending perpendicularly to rod 25.
  • central control unit 18 In response to the incoming shift-start signal, central control unit 18 emits a control signal which first stops and then reverses motor 16 to back up grinding wheel 7 by an adjustment quantity equal to said predetermined distance A, so that abrasive surface 12 of grinding wheel 7 is restored to the ideal work position to obtain the desired characteristics of the next sheet 2.
  • grinding wheel 7 is conveniently backed up by an adjustment quantity greater than said predetermined distance A, and, once the grinding wheel is backed up, central control unit 18 again reverses motor 16 and feeds grinding wheel 7 forward by the difference between said adjustment quantity and predetermined distance A.
  • switch 47 and all the electric components of device 21 in general may be located away from grinding wheel 7 and outside chamber 8 containing the cutting fluid, thus eliminating any hazards posed by the electric components and relative wiring coming into contact with the cutting fluid.
  • the grinding wheels can be controlled independently, in use, which is extremely useful when, for any reason, only one or some of the grinding wheels on the machine need adjusting or replacing.
  • references surface 31 may, obviously, be of any shape and size, and may be selected, for example, as a function of the geometry of the abrasive surface of the grinding wheel, which may, for example, be lateral and concave, as opposed to a flat face surface.
  • plate 30 may, obviously, be replaced with a straightforward cylindrical rod, or a rod of any shape, positioned transversely so that the lateral surface of the rod cooperates with the abrasive surface of the grinding wheel, or frontally so that the end surface of the rod - which may, obviously, be the same or a different shape and size from the cross section of the rod - cooperates with the abrasive surface of the grinding wheel.
  • a rod with a polygonal cross section one longitudinal edge of the rod, and therefore substantially a line, is obviously sufficient to define a reference for the abrasive surface of the grinding wheel.
  • the reference surface may therefore be a surface other than the one described, and, in particular, a luminous surface, conveniently one defining a light beam.
  • the instant of contact between the abrasive surface of the grinding wheel and the reference surface may be determined by detecting the variation in one or more characteristics of the light beam.
  • the respective bodies/reference beams for the respective surfaces of the grinding wheels may obviously be replaced with a single body/reference beam common to all the respective devices 21 of the grinding wheels.
  • arm 49 and switch 47 may be replaced with other, e.g. optical or magnetic, devices.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
EP01123903A 2000-10-06 2001-10-05 Verfahren zum Nachstellen der Schleifscheibe an einer Flachglasschleifmaschine, und Maschine zur Anwendung solch eines Verfahrens Withdrawn EP1197295A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2000TO000938A IT1320701B1 (it) 2000-10-06 2000-10-06 Metodo per il recupero dell'usura di una mola in una macchina dimolatura di lastre di vetro e macchina di molatura utilizzante tale
ITTO000938 2000-10-06

Publications (2)

Publication Number Publication Date
EP1197295A2 true EP1197295A2 (de) 2002-04-17
EP1197295A3 EP1197295A3 (de) 2002-08-21

Family

ID=11458098

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01123903A Withdrawn EP1197295A3 (de) 2000-10-06 2001-10-05 Verfahren zum Nachstellen der Schleifscheibe an einer Flachglasschleifmaschine, und Maschine zur Anwendung solch eines Verfahrens

Country Status (3)

Country Link
US (1) US20020045404A1 (de)
EP (1) EP1197295A3 (de)
IT (1) IT1320701B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1422024A1 (de) * 2002-11-20 2004-05-26 BIESSE S.p.A. Vorrichtung und Verfahren zur Kontrolle der Betriebsstellung einer Polierscheibe in einer Maschine zum Polieren von Glasplatten, Marmorplatten und steinartigen oder ähnlichen Materialen
ITTO20090341A1 (it) * 2009-04-29 2010-10-30 Bottero Spa Gruppo di molatura per lo smusso di spigoli di lastre di vetro
US10092895B2 (en) 2007-01-23 2018-10-09 Sued-Chemie Catalysts Italia S.R.L. Process for catalytic decomposition of nitrogen protoxide
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.
EP4209304A1 (de) * 2022-01-05 2023-07-12 Benteler Maschinenbau GmbH Glaskantenbearbeitungsanlage

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1716973B1 (de) * 2004-02-18 2009-04-01 Toyoda Van Moppes Ltd. Richtvorrichtung mit zwei stirnflächen, richtwerkzeug mit zwei stirnflächen und verfahren zum richten mit zwei stirnflächen
USD594887S1 (en) * 2007-10-12 2009-06-23 Tecomec S.P.A. Bench chain grinder
CA122683S (en) * 2007-10-12 2009-03-23 Tecomec Spa Saw
CN107695825B (zh) * 2017-11-08 2023-08-25 佛山市南海东泰创展精密机械有限公司 一种玻璃磨边机及其工作方法
IT201800004034A1 (it) 2018-03-28 2019-09-28 Tecomec Srl Affilatrice portatile
USD969889S1 (en) 2019-12-13 2022-11-15 Tecomec S.R.L. Sharpening machine
CN111571440A (zh) * 2020-06-08 2020-08-25 广东金玻智能装备有限公司 一种玻璃磨边机构的多刀头进给系统

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH651491A5 (de) * 1980-12-23 1985-09-30 Maag Zahnraeder & Maschinen Ag Vorrichtung zum positionieren einer schleifscheibe.
DE59107452D1 (de) * 1990-08-31 1996-04-04 Sulzer Ag Bearbeitungsvorrichtung mit Roboter und Werkzeugaufnahme
IT1266734B1 (it) * 1994-06-28 1997-01-14 F M F Ind S R L Gruppo per la molatura di lastre di vetro.

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1422024A1 (de) * 2002-11-20 2004-05-26 BIESSE S.p.A. Vorrichtung und Verfahren zur Kontrolle der Betriebsstellung einer Polierscheibe in einer Maschine zum Polieren von Glasplatten, Marmorplatten und steinartigen oder ähnlichen Materialen
US10092895B2 (en) 2007-01-23 2018-10-09 Sued-Chemie Catalysts Italia S.R.L. Process for catalytic decomposition of nitrogen protoxide
ITTO20090341A1 (it) * 2009-04-29 2010-10-30 Bottero Spa Gruppo di molatura per lo smusso di spigoli di lastre di vetro
EP2246151A1 (de) * 2009-04-29 2010-11-03 Bottero S.p.A. Schleifanordnung zur Abschrägung von Kanten von Glasplatten
US8408971B2 (en) 2009-04-29 2013-04-02 Bottero S.P.A. Grinding assembly for bevelling corners of glass sheets
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
EP4209304A1 (de) * 2022-01-05 2023-07-12 Benteler Maschinenbau GmbH Glaskantenbearbeitungsanlage

Also Published As

Publication number Publication date
ITTO20000938A1 (it) 2002-04-06
IT1320701B1 (it) 2003-12-10
EP1197295A3 (de) 2002-08-21
ITTO20000938A0 (it) 2000-10-06
US20020045404A1 (en) 2002-04-18

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