EP2616215B1 - Digitally controlled grinder, particularly for glass sheets with straight sides - Google Patents

Digitally controlled grinder, particularly for glass sheets with straight sides Download PDF

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Publication number
EP2616215B1
EP2616215B1 EP11754690.3A EP11754690A EP2616215B1 EP 2616215 B1 EP2616215 B1 EP 2616215B1 EP 11754690 A EP11754690 A EP 11754690A EP 2616215 B1 EP2616215 B1 EP 2616215B1
Authority
EP
European Patent Office
Prior art keywords
glass sheet
grinding
ground
grinder
respect
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.)
Active
Application number
EP11754690.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2616215A1 (en
Inventor
Stefano Bavelloni
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.)
NEPTUN Srl
Original Assignee
NEPTUN Srl
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Filing date
Publication date
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Publication of EP2616215A1 publication Critical patent/EP2616215A1/en
Application granted granted Critical
Publication of EP2616215B1 publication Critical patent/EP2616215B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • 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
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/005—Feeding or manipulating devices specially adapted to grinding machines
    • 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
    • B24B49/02—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 according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent
    • 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
    • B24B49/10—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 electrical 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
    • 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
    • B24B49/12—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 optical 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
    • 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
    • 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

Definitions

  • the present invention relates to a digitally controlled grinder, particularly for glass sheets with straight sides.
  • the quantity of material to be removed from the rough glass sheet can, in some cases, be defined by adjusting the height of the loading surface with respect to the grinding surface.
  • Such conventional grinders are not devoid of drawbacks among which is the fact that the glass sheet on exit from the grinding station can only have the same shape that the glass sheet had on entry to the grinding station.
  • the loading surface can only be lowered with respect to the grinding surface by an amount equal to the quantity of material to be removed, the final geometry of the glass sheet will have the same angles of the corners as the geometry of the glass sheet had on entry to the grinding station.
  • a square glass sheet can come out squared, i.e., with the angles of the corners between adjacent sides equal to 90°, only if it already had the corners squared at 90° when it was rough.
  • Document EP1 914 038 A2 which forms the basis for the preamble of claim 1 discloses a digitally controlled glass sheet edge grinder.
  • US 1 961 487 A discloses a glass sheet grinding machine comprising a plurality of rollers forming a supporting and guiding runway for glass sheets fed on the rollers to engage a surfacing (grinding/polishing) wheel.
  • the upper surfacing portion of the surfacing wheel projects upwardly through a slot in the bottom of a horizontally extending fixed channel iron, and at opposite sides of the projecting upper surfacing portion of the surfacing wheel there are provided stationary supporting blocks fixed to the channel iron and having resilient pads for sliding support of the glass sheets.
  • Each of the rollers is individually adjustably connected in a vertical direction to the fixed horizontal channel iron by means of a nut screwed on a transverse pin of each roller extending through a vertical slot provided in the horizontal channel iron.
  • the aim of the present invention is to provide a digitally controlled grinder, particularly for glass sheets with straight sides, that solves and overcomes, respectively, the drawbacks and the limitations of the known art.
  • an object of the present invention is to provide a grinder that makes it possible to obtain a glass sheet with angles of the corners between adjacent sides and dimensions of any value irrespective of the value of the initial angles of the corners and of the initial dimensions.
  • Another object of the present invention is to provide a grinder that is economically competitive with respect to those of the known art.
  • the digitally controlled grinder particularly for glass sheets with straight sides, generally designated by the reference numeral 1, according to the invention, comprises a supporting structure that can be arranged on a resting surface 2 and is constituted by a bed and a frame 4 which is made from a plurality of posts 5 and cross-members 6 which are arranged on a plane that is substantially inclined with respect to the vertical direction.
  • the grinder 1 is subdivided into a loading station 7a, followed by a grinding station 7b, followed in turn by an unloading station 7c.
  • the loading station 7a comprises at least one first conveyance guide 8 which defines a loading surface 9 onto which at least one glass sheet 10 to be ground is loaded.
  • This first conveyance guide 8 is adapted to convey the glass sheet 10 to be ground into the grinding station 7b with the glass sheet 10 to be ground resting, at one of its sides to be ground 10a, on the loading surface 9.
  • the first conveyance guide 8 can be provided by a straight element having a central groove, the base of which defines the loading surface 9 and in which the glass sheet 10 to be ground is inserted.
  • the glass sheet 10 is placed so that it can slide laterally on the cross-members 6 of the frame 4, which are provided with adapted idle rollers 12 that are adapted to allow the sliding of the glass sheet 10 with respect to the frame 4.
  • the grinding station 7b comprises a plurality of grinding wheels 13 that are mutually adjacent and define at least one grinding surface 14 that is adjacent to the loading surface 9.
  • the grinding wheels 13 can be provided with different tools so as to enable both chipping operations, with the glass sheet 10 passing over the first grinding wheels 13 present in the grinding station 7b, and finishing operations, with the glass sheet 10 passing over the last grinding wheels 13 present in the grinding station 7b.
  • the movement of the glass sheet 10 along the grinding surface 14 comes about by means of at least one second conveyance guide 15 which can be provided by a pair of straight elements provided with motorized rollers adapted to entrain the glass sheet 10 as occurs in the loading station 7a.
  • the groove is a through groove and ends with the grinding surface 14 defined by the grinding wheels 13.
  • the unloading station 7c comprises at least one third conveyance guide 16 which defines an unloading surface 17 on which the glass sheet 10 is unloaded once the work is done, i.e., once it has been ground in the grinding station 7b.
  • the third conveyance guide 16 can be of the same type as the first conveyance guide 8 and the unloading surface 17 is adjacent to the grinding surface 14 on the opposite side with respect to the loading surface 9.
  • measurement means 18 are provided which are adapted to measure either or both the shape and the dimensions of the glass sheet 10 to be ground arranged on the loading surface 9, combined rotary and translational motion means 19 adapted for the combined rotary and translational motion of the loading surface 9 with respect to the grinding surface 14 for the combined rotary and translational motion of the glass sheet 10 to be ground with respect to the grinding surface 14, and processing and control means 20 which are functionally connected both to the measurement means 18 and to the combined rotary and translational motion means 19 and are adapted to actuate the latter means as a function of the measurements made by the measurement means 18 and of the final geometry to be obtained of the glass sheet 10.
  • the measurement means 18 can consist of at least two photocells 21, which are arranged in a preset position with respect to the grinding surface 14 and are adapted to detect the passage of the glass sheet 10 to be ground on the loading surface 9 at a side 10b thereof that is adjacent to the side 10a to be ground in order to determine, by way of the processing and control means 20, the angle comprised between the adjacent side 10b and the side 10a to be ground.
  • such means can comprise, in addition to the photocells 21 shown or as an alternative to them, other types of sensor such as, for example, linear encoders or the like.
  • the processing and control means 20 comprise at least one user interface 22 provided, for example, by a computer and adapted for the entry by an operator of control data that define the final geometry of the glass sheet 10.
  • the combined rotary and translational motion means 19 comprise at least two actuators 24 and 25 which are associated with the first conveyance guide 8, for example, at its end portions and are adapted to move it with respect to the grinding surface 14.
  • the two actuators 24 and 25 are functionally connected to the processing and control means 20 and can be actuated independently of each other in order to enable both rotations and translational movements of the loading surface 9.
  • the first side 10b to be worked on is arranged on the entry conveyor and is processed.
  • the glass sheet 10 is returned to the loading surface 9 with the side 10a to be ground adjacent to the side 10b, which was ground previously, in such a way that the latter is arranged on the entry conveyor for the processing of the side 10a to be ground.
  • the angle comprised between the side 10a to be ground and the adjacent side 10b will be unchanged with respect to the initial geometry, and the adjacent side 10b will diverge from the normal to the grinding surface 14 by an angle " ⁇ ", which is measured by the two photocells 21 during the passage of the glass sheet 10 to be ground on the loading surface 9.
  • the first conveyance guide 8 provided with the two actuators 24 and 25, is made to rotate through an angle " ⁇ " which is such as to compensate for the inclination measured previously, and carry the side 10b inclined with respect to the grinding surface 14 at an angle equal to that of the desired final geometry.
  • the desired final geometry is to have the sides 10a and 10b square with respect to each other, i.e., defining a right angle.
  • the conveyor advances but, in order to allow the correct entry of the glass sheet 10 into the grinding station 7b, the loading surface 9 no longer being in line with the grinding surface 14, the first conveyance guide 8 advances the glass sheet 10 and at the same time is raised or lowered, interpolating this movement with the advancement of the glass sheet 10, depending on the angle of inclination, positive or negative, so as to accompany, during transport for grinding, the glass sheet 10 in line with the grinding surface 14, as shown in Figure 3 .
  • the processing and control means 20 can be implemented so as to not require the operator to enter any control data.
  • the grinder 1 is capable of defining the final dimensions of the glass sheet 10, and not only the geometry of the angles of its corners.
  • this can come about by means of entering the final geometry (the angles of the corners and the lengths of the sides) into the processing and control means 20 and the measurement of the length of each worked side of the glass sheet 10 by way of the measurement means 18.
  • the grinder 1 measures its length and during working of the subsequent sides the grinder 1 measures each of their lengths in order to then arrive at the final size of the glass sheet 10 by managing the removal of material by means of adjusting the height and orientation of the loading surface 9 with respect to the grinding surface 14 based on the necessary trigonometric calculations performed by the processing and control means 20, thus obtaining a worked glass sheet 10 of the desired shape and dimensions.
  • the digitally controlled grinder particularly for glass sheets with straight sides, according to the present invention, fully achieves the intended aim and objects since it makes it possible to obtain glass sheets with angles of the corners and dimensions of any value irrespective of the value of the initial angles of the corners and of the initial dimensions.
  • Another advantage of the grinder, according to the present invention consists in that it is, from the point of view of investment, economically competitive with respect to those of the known art and, from the point of view of processing costs, economically advantageous with respect to those of the known art since it makes it possible to do away with all the measurement operations carried out outside the machine which, in machines of the known type, are done manually by the operator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
EP11754690.3A 2010-09-14 2011-09-13 Digitally controlled grinder, particularly for glass sheets with straight sides Active EP2616215B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2010A001669A IT1401927B1 (it) 2010-09-14 2010-09-14 Macchina molatrice a controllo numerico, particolarmente per lastre di vetro a lati rettilinei.
PCT/EP2011/065861 WO2012035018A1 (en) 2010-09-14 2011-09-13 Digitally controlled grinder, particularly for glass sheets with straight sides

Publications (2)

Publication Number Publication Date
EP2616215A1 EP2616215A1 (en) 2013-07-24
EP2616215B1 true EP2616215B1 (en) 2018-04-04

Family

ID=43738896

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11754690.3A Active EP2616215B1 (en) 2010-09-14 2011-09-13 Digitally controlled grinder, particularly for glass sheets with straight sides

Country Status (9)

Country Link
US (1) US20130171913A1 (it)
EP (1) EP2616215B1 (it)
CN (1) CN103118837A (it)
AU (1) AU2011303973A1 (it)
BR (1) BR112013005991A2 (it)
CA (1) CA2811157A1 (it)
IT (1) IT1401927B1 (it)
RU (1) RU2013116991A (it)
WO (1) WO2012035018A1 (it)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5831974B2 (ja) * 2011-11-08 2015-12-16 Ｍｉｐｏｘ株式会社 端縁部を研磨テープにより研磨仕上げした板ガラス並びに板ガラス端縁部の研磨方法及び研磨装置
CN103737450B (zh) * 2014-01-26 2016-03-09 中国建材检验认证集团苏州有限公司 一种批量化的小玻璃自动磨边机
IT202100005162A1 (it) * 2021-03-05 2022-09-05 Neptun S R L Dispositivo per la lavorazione di parallelogrammi su molatrici rettilinee, particolarmente per lastre di vetro.

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1961487A (en) * 1930-10-03 1934-06-05 Libbey Owens Ford Glass Co Glass grinding machine
AT405724B (de) * 1984-06-14 1999-11-25 Lisec Peter Vorrichtung zum abtragenden bearbeiten der randbereiche einer glastafel
AU625449B2 (en) * 1990-10-23 1992-07-09 Glass Engineering Pty. Ltd. An apparatus for grinding glass
IT1272617B (it) * 1993-09-13 1997-06-26 Aisa Spa Macchina automatica per la realizzazione di smussi arrotondati in corrispondenza di spigoli di lastre piane
ITMI990645U1 (it) * 1999-10-25 2001-04-25 Bovone Internat Holding S A Dispositivo di avanzamento per macchine per la molatura di lastre di vetro
ITTV20060184A1 (it) * 2006-10-19 2008-04-20 For El Base Di Vianello Fortunato & C Snc Macchina automatica e procedimento automatico per la smerigliatura dei bordi di lastre di vetro.
CN100493842C (zh) * 2007-06-28 2009-06-03 中国兵器工业第五八研究所 一种数控磨边机及磨削方法
ITTV20070162A1 (it) * 2007-09-21 2009-03-22 For El Base Di Vianello Fortun Macchina automatica e procedimento automatico per la molatura del bordo perimetrale delle lastre di vetro.

Also Published As

Publication number Publication date
RU2013116991A (ru) 2014-10-20
US20130171913A1 (en) 2013-07-04
BR112013005991A2 (pt) 2016-06-07
CN103118837A (zh) 2013-05-22
EP2616215A1 (en) 2013-07-24
ITMI20101669A1 (it) 2012-03-15
CA2811157A1 (en) 2012-03-22
WO2012035018A1 (en) 2012-03-22
AU2011303973A1 (en) 2013-05-02
IT1401927B1 (it) 2013-08-28

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