EP2039463A1 - Automatic grinding wheel adjusting system, especially for glass grinding machines - Google Patents

Automatic grinding wheel adjusting system, especially for glass grinding machines Download PDF

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Publication number
EP2039463A1
EP2039463A1 EP08011747A EP08011747A EP2039463A1 EP 2039463 A1 EP2039463 A1 EP 2039463A1 EP 08011747 A EP08011747 A EP 08011747A EP 08011747 A EP08011747 A EP 08011747A EP 2039463 A1 EP2039463 A1 EP 2039463A1
Authority
EP
European Patent Office
Prior art keywords
grinding wheel
locator
grinding
shaft
fact
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.)
Granted
Application number
EP08011747A
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German (de)
French (fr)
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EP2039463B1 (en
Inventor
Domenico Stanco
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.)
Cmb Costruzioni Meccaniche Besana SpA
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Cmb Costruzioni Meccaniche Besana SpA
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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
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/22—Equipment for exact control of the position of the grinding tool or work at 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

Definitions

  • the processing of glass plates is done on rectilinear automatic machines and on double-sided grinding machines that allow grinding the edges of the plate by a multiple number of cup-shaped grinding wheels.
  • the grinding wheels are of a different grain size, so that the first grinding wheels contacting the plate achieve a greater removal of material, while the subsequent grinding wheels set up downstream of the former are of a finer grain size, so as to perform a finishing treatment on the edge of the plate.
  • the grinding wheels are normally mounted on spindles fitted with an adjusting screw, so as to adjust the position of the grinding wheel with respect to the edge of the plate to be processed, depending on the grinding wheel's position along the edge of the plate and on the grain size of the grinding wheel itself.
  • the object of this patent application is a grinding machine equipped with a rod fitted with fixed locators, so as to allow the grinding wheel to be correctly positioned against the edge of the plate.
  • This automatic system in fact included the presence of a mobile rod inside the grinding section.
  • the cooling water for the grinding wheels and the presence of the glass dust resulting from the grinding operation form in fact a deposit on the rod which affects its proper operation in the long term.
  • This setup of the automatic grinding wheel adjusting means thus involves a frequent maintenance of the system on the part of the user.
  • the primary task of the present invention is therefore to eliminate the drawbacks affecting the adjusting system already known from the previous Italian patent application.
  • a purpose of the present invention is to provide an automatic grinding wheel adjusting system capable of eliminating or at least reducing the maintenance problems affecting the system already known from the previous patent application, while improving the system's and therefore the machine's reliability while the cutting its maintenance and other costs associated with a shutdown of the machine over the maintenance period.
  • a system for an automatic grinding wheel adjustment of a grinding machine for glass and similar materials characterized by the fact that it comprises a locator for each grinding wheel.
  • This locator is set up in front of each grinding wheel, so as to allow each grinding wheel to rest on the same and achieve its proper working position. This operation is performed in a machine regulating phase, before starting the glass processing operation.
  • the adjusting system according to the invention is also characterized by the presence of means driving said locators, which are set up outside the glass processing area and therefore out of contact with the grinding wheel cooling liquid and the dusts originating from the grinding process.
  • the same concerns an automatic adjusting system for the grinding wheels of a grinding machine for glass plates, wherein a locator 4 is firmly attached to the extremity of a shaft 9 facing each grinding wheel 8. This locator sets the distance between the processing surface of the grinding wheel and the edge of the edge of the plate being processed.
  • the shaft 9 is mounted on a guide bushing 5 that extends, through a grinding wheel retainer shaft 3, into the grinding wheel processing zone, where said shaft 9 is mounted on bearings that lock it in an axial direction, thus allowing it to rotate around its axis.
  • the locator is therefore mobile with the rotation of the shaft 9, because it is firmly attached to the extremity of the latter.
  • the rotation of the shaft 9 allows moving the locator 4 from the position A in the figure where it forms a reference point facing the grinding wheel 8, to the position B where it is detached from the grinding wheel, which can therefore process the plate.
  • the rotation of the shaft 9 that allows commanding the positioning of the locator 4 is controlled by locator driving means.
  • locator driving means comprise a rod 2 that connects, through a crankshaft, the extremities of the shafts 9 opposite the locators, one or more threaded ring nuts 6 and 7 for an axial adjustment of the position of the locators 9, and a pneumatic driving cylinder 1.
  • the diamond grinding wheels normally employed for the processing of glass plates have different grain sizes, depending on the type of processing they are called to perform. More in detail, the grinding wheels of a coarse grain size remove a greater amount of material, and those of a finer grain size perform surface finishing operations while removing a lesser quantity of material.
  • the adjustment of the locators 4 thus determines the position of the grinding wheels 8 with respect to the finished size of the glass item, so that the last locator downstream of the grinding wheel series with respect to the glass advancing direction will be adjusted in the zero point position.
  • the second-last locator can for instance be adjusted to a distance of ab. 0.2 mm, which equals the amount of material to be removed from the last grinding wheel, the third-last locator will be set at a distance of about 0.5 mm from the zero point and so on up to the first locator, which be the farthest from point zero and the locator of the first grinding wheel that performs the chipping of the glass edge.
  • the operator positions the locators 4 depending on the grain size, as described above.
  • the registration of the position of the locators may be performed by using the adjusting means for the position of the locators, where said adjusting means may for instance comprise one or more threaded ring nuts 6 and 7 mounted on the shaft 9.
  • the actuating of the driving cylinder 1 causes, through the rod 2 and the crankshaft connecting system not shown in the figures, the rotation of the shafts 9 and consequently of the locators 4, which shift from the position A useful for positioning the grinding wheels to the position B where the locators are removed from the grinding wheels, thus allowing them to be driven and thence the glass to be processed.
  • the automatic grinding wheel adjusting system according to the present invention allows securing the advantages sought after and overcoming the drawbacks left unresolved by similar machines already known from the state of the art.
  • the automatic grinding wheel adjusting system according to the present invention allows positioning all the grinding wheels simultaneously and in a very short time against the edge of the plate, thanks to the use of the locators under remote control.
  • the automatic grinding wheel adjusting system according to the present invention also proves to be more reliable and less susceptible to the drawbacks associated with the presence of dirt due to the processing residues and refrigerating liquid, as all the controlling and driving organs are set up in a clean area, far from the processing grinding wheels.

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)
  • Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
  • Joining Of Glass To Other Materials (AREA)

Abstract

The object of the present invention is an automatic system to adjust the positioning of the grinding wheels on a grinding machine, especially for the grinding of glass plates, characterized by the fact that it comprises a locator (4) for each grinding wheel (8) and driving means for said locators (1, 2, 6, 7, 9) set up outside the glass plate processing area and therefore out of contact with the grinding wheel cooling fluid and the dusts originating from the grinding process

Description

  • As is known, the processing of glass plates is done on rectilinear automatic machines and on double-sided grinding machines that allow grinding the edges of the plate by a multiple number of cup-shaped grinding wheels. The grinding wheels are of a different grain size, so that the first grinding wheels contacting the plate achieve a greater removal of material, while the subsequent grinding wheels set up downstream of the former are of a finer grain size, so as to perform a finishing treatment on the edge of the plate.
  • In the grinding machines of a known type, the grinding wheels are normally mounted on spindles fitted with an adjusting screw, so as to adjust the position of the grinding wheel with respect to the edge of the plate to be processed, depending on the grinding wheel's position along the edge of the plate and on the grain size of the grinding wheel itself.
  • Based on the state of the art of the grinding machines for glass processing, it is known that both the initial positioning of the grinding wheels as well as their re-positioning on the edge of the plate as needed to correct the different action due to grinding wheel wear is done manually.
  • The state of the art also includes the Italian patent application no. M12002A000289 in the name of the same Applicant.
  • The object of this patent application is a grinding machine equipped with a rod fitted with fixed locators, so as to allow the grinding wheel to be correctly positioned against the edge of the plate.
  • Despite the fact that this device constituted a substantial improvement over the traditional machines requiring the operator's manual action for a positioning of the grinding wheels, a number of drawbacks were encountered while operating the machine.
  • This automatic system in fact included the presence of a mobile rod inside the grinding section.
  • The cooling water for the grinding wheels and the presence of the glass dust resulting from the grinding operation form in fact a deposit on the rod which affects its proper operation in the long term.
  • This setup of the automatic grinding wheel adjusting means thus involves a frequent maintenance of the system on the part of the user.
  • The primary task of the present invention is therefore to eliminate the drawbacks affecting the adjusting system already known from the previous Italian patent application.
  • Within this task, in particular, a purpose of the present invention is to provide an automatic grinding wheel adjusting system capable of eliminating or at least reducing the maintenance problems affecting the system already known from the previous patent application, while improving the system's and therefore the machine's reliability while the cutting its maintenance and other costs associated with a shutdown of the machine over the maintenance period.
  • This task and other purposes that will become better evident following the description of a preferred form of embodiment of this invention are achieved by a system for an automatic grinding wheel adjustment of a grinding machine for glass and similar materials, characterized by the fact that it comprises a locator for each grinding wheel. This locator is set up in front of each grinding wheel, so as to allow each grinding wheel to rest on the same and achieve its proper working position. This operation is performed in a machine regulating phase, before starting the glass processing operation. The adjusting system according to the invention is also characterized by the presence of means driving said locators, which are set up outside the glass processing area and therefore out of contact with the grinding wheel cooling liquid and the dusts originating from the grinding process.
  • Further characteristics and advantages of the present invention will become better evident from the following detailed description offered in an exemplifying and non-limiting form and illustrated in the attached figures, wherein:
    • Figure 1 shows a top view of a detail of the grinding machine fitted with the grinding wheel adjusting system according to the invention.
    • Figure 2 shows a detail of the same grinding machine according to this invention, in a lateral view.
  • According to the preferred form of embodiment of the present invention illustrated in the mentioned figures for exemplifying purposes, the same concerns an automatic adjusting system for the grinding wheels of a grinding machine for glass plates, wherein a locator 4 is firmly attached to the extremity of a shaft 9 facing each grinding wheel 8. This locator sets the distance between the processing surface of the grinding wheel and the edge of the edge of the plate being processed.
  • The shaft 9 is mounted on a guide bushing 5 that extends, through a grinding wheel retainer shaft 3, into the grinding wheel processing zone, where said shaft 9 is mounted on bearings that lock it in an axial direction, thus allowing it to rotate around its axis.
  • The locator is therefore mobile with the rotation of the shaft 9, because it is firmly attached to the extremity of the latter.
  • As can be seen in Figure 2, the rotation of the shaft 9 allows moving the locator 4 from the position A in the figure where it forms a reference point facing the grinding wheel 8, to the position B where it is detached from the grinding wheel, which can therefore process the plate.
  • In an advantageous manner, the rotation of the shaft 9 that allows commanding the positioning of the locator 4 is controlled by locator driving means.
  • These locator driving means comprise a rod 2 that connects, through a crankshaft, the extremities of the shafts 9 opposite the locators, one or more threaded ring nuts 6 and 7 for an axial adjustment of the position of the locators 9, and a pneumatic driving cylinder 1.
  • The operation of the automatic adjusting system according to the illustration given up to this point is therefore as follows:
  • The diamond grinding wheels normally employed for the processing of glass plates have different grain sizes, depending on the type of processing they are called to perform. More in detail, the grinding wheels of a coarse grain size remove a greater amount of material, and those of a finer grain size perform surface finishing operations while removing a lesser quantity of material. The adjustment of the locators 4 thus determines the position of the grinding wheels 8 with respect to the finished size of the glass item, so that the last locator downstream of the grinding wheel series with respect to the glass advancing direction will be adjusted in the zero point position.
  • The second-last locator can for instance be adjusted to a distance of ab. 0.2 mm, which equals the amount of material to be removed from the last grinding wheel, the third-last locator will be set at a distance of about 0.5 mm from the zero point and so on up to the first locator, which be the farthest from point zero and the locator of the first grinding wheel that performs the chipping of the glass edge.
  • Whenever, in a machine calibrating stage, it is necessary to adjust the positioning of the locators with respect to the zero point as described above, the operator positions the locators 4 depending on the grain size, as described above. The registration of the position of the locators may be performed by using the adjusting means for the position of the locators, where said adjusting means may for instance comprise one or more threaded ring nuts 6 and 7 mounted on the shaft 9. Once the distance of the locators from the zero point has been set, which will at this point be in the position A of Figure 2, the operator acts by using an automatic control that rests the grinding wheels on the locators 4. Once the grinding wheels have been positioned, the operator acts on the driving cylinder 1 to move the locators 4 to the position B, where they cannot interfere with the rotation of the grinding wheels.
  • The actuating of the driving cylinder 1 causes, through the rod 2 and the crankshaft connecting system not shown in the figures, the rotation of the shafts 9 and consequently of the locators 4, which shift from the position A useful for positioning the grinding wheels to the position B where the locators are removed from the grinding wheels, thus allowing them to be driven and thence the glass to be processed.
  • It has thus been shown that the automatic grinding wheel adjusting system according to the present invention allows securing the advantages sought after and overcoming the drawbacks left unresolved by similar machines already known from the state of the art. In particular, it has been shown that the automatic grinding wheel adjusting system according to the present invention allows positioning all the grinding wheels simultaneously and in a very short time against the edge of the plate, thanks to the use of the locators under remote control. The automatic grinding wheel adjusting system according to the present invention also proves to be more reliable and less susceptible to the drawbacks associated with the presence of dirt due to the processing residues and refrigerating liquid, as all the controlling and driving organs are set up in a clean area, far from the processing grinding wheels.
  • The specialist in the branch may apply numerous modifications, without thereby abandoning the range of protection of the present invention.
  • The range of protection of the claims is therefore not to be limited to the illustrations or preferred forms of embodiment shown in the description for exemplifying purposes, the claims must rather comprise all the characteristics of a patentable novelty deducible from the present invention, including all the characteristics that could be treated as being equivalent by a specialist in the branch.

Claims (5)

  1. Automatic grinding wheel position adjusting system, especially for grinding machines for the processing of glass plates, characterized by the fact of comprising a locator (4) for each of said grinding wheels, where said locator is set up in front of said grinding wheel so as to arrest the grinding wheel's forward motion to the edge of the plate under processing in the position determined by said locator, and driving means for said locators (1, 2, 6, 7, 9) set up outside the plate processing area and therefore out of contact with the grinding wheel cooling liquid and the dusts deriving from the grinding process.
  2. Automatic system according to the previous claim, characterized by the fact that each of said locators (4) is mobile between a position A engaging it with the grinding wheel (8), and a position B disengaging it from the grinding wheel (8).
  3. Automatic system according to the previous claim, characterized by the fact that said locator driving means comprise, for each locator (4), a shaft (9) that can be rotated around its axis and extends into the zone of the grinding wheels with a grinding wheel retainer shaft (3) and carries said locator (4) and one or more threaded and axially adjustable ring nuts (6,7) in a firmly fastened manner.
  4. Automatic system according to the previous claim, characterized by the fact that said locator driving means also comprise a driving cylinder (1) connected to a rod (2) that is in turn connected to each of said shafts (9) through a crankshaft and crank system, so that the shifting motion of the shaft (2) can be transformed into an motion of axially rotating said shafts (9).
  5. Automatic system according to the previous claim, characterized by the fact that said grinding wheel retaining shaft (3) rotates while being firmly attached to said shaft (9), and by the fact that said locator (4) is firmly attached to the extremity of said grinding wheel retainer shaft (3), so that a rotation of said shaft (9) is matched by a rotation of said locator (4) that moves from said grinding wheel locating position A to said grinding wheel disengaging position B.
EP20080011747 2007-09-19 2008-06-27 Automatic grinding wheel adjusting system, especially for glass grinding machines Not-in-force EP2039463B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI20071806 ITMI20071806A1 (en) 2007-09-19 2007-09-19 AUTOMATIC WHEEL ADJUSTMENT SYSTEM PARTICULARLY FOR GLAZING MACHINES FOR GLASS WORKING

Publications (2)

Publication Number Publication Date
EP2039463A1 true EP2039463A1 (en) 2009-03-25
EP2039463B1 EP2039463B1 (en) 2013-08-28

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EP20080011747 Not-in-force EP2039463B1 (en) 2007-09-19 2008-06-27 Automatic grinding wheel adjusting system, especially for glass grinding machines

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EP (1) EP2039463B1 (en)
IT (1) ITMI20071806A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201900004559A1 (en) * 2019-03-27 2020-09-27 Neptun S R L Automatic tool measuring method and device, particularly for glass grinding machines.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0689899A1 (en) * 1994-06-28 1996-01-03 BOTTERO S.p.A. An assembly for grinding sheets of glass
WO1996011083A1 (en) * 1994-10-11 1996-04-18 Keller Gmbh Lateral evening process and device
EP1063053A2 (en) * 1999-06-21 2000-12-27 Z. BAVELLONI S.p.A. Bilateral automatic machine for edge-machining plates of glass, stone-like materials and the like
US7001249B1 (en) * 2005-01-11 2006-02-21 Guardian Industries, Inc. Methods and systems for finishing edges of glass sheets

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0689899A1 (en) * 1994-06-28 1996-01-03 BOTTERO S.p.A. An assembly for grinding sheets of glass
WO1996011083A1 (en) * 1994-10-11 1996-04-18 Keller Gmbh Lateral evening process and device
EP1063053A2 (en) * 1999-06-21 2000-12-27 Z. BAVELLONI S.p.A. Bilateral automatic machine for edge-machining plates of glass, stone-like materials and the like
US7001249B1 (en) * 2005-01-11 2006-02-21 Guardian Industries, Inc. Methods and systems for finishing edges of glass sheets

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201900004559A1 (en) * 2019-03-27 2020-09-27 Neptun S R L Automatic tool measuring method and device, particularly for glass grinding machines.
EP3715052A1 (en) * 2019-03-27 2020-09-30 Neptun S.r.l. Method and device for the automatic measurement of tools, particularly for grinding machines for glassworking

Also Published As

Publication number Publication date
ITMI20071806A1 (en) 2009-03-20
EP2039463B1 (en) 2013-08-28

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