EP3012066B1 - Bilateral machine for machining edges of plates with integrated corner radiusing devices - Google Patents

Bilateral machine for machining edges of plates with integrated corner radiusing devices Download PDF

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Publication number
EP3012066B1
EP3012066B1 EP15186794.2A EP15186794A EP3012066B1 EP 3012066 B1 EP3012066 B1 EP 3012066B1 EP 15186794 A EP15186794 A EP 15186794A EP 3012066 B1 EP3012066 B1 EP 3012066B1
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EP
European Patent Office
Prior art keywords
plate
slide
radiusing
abutment
longitudinal direction
Prior art date
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EP15186794.2A
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German (de)
French (fr)
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EP3012066A1 (en
Inventor
Marco Belli
Andrea Cucchi
Marco FURLANI
Massimiliano Gervasoni
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Biesse SpA
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Biesse 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
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/002—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor for travelling workpieces
    • 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
    • B24B27/00—Other grinding machines or devices
    • B24B27/0076—Other grinding machines or devices grinding machines comprising two or more grinding tools
    • 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
    • B24B47/02—Drives or gearings; Equipment therefor for performing a reciprocating movement of carriages or work- tables
    • B24B47/04—Drives or gearings; Equipment therefor for performing a reciprocating movement of carriages or work- tables by mechanical gearing only
    • 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
    • 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
    • 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
    • B24B9/105—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 using a template

Definitions

  • the invention provides a bilateral machine having the features of claim 1 and a method having the features of claim 3.
  • edge of the plate is used to indicate anyone of the sides of the plate.
  • lateral edges of the plate designates the two sides of the plate which are parallel to the direction of advancement of the plate along the machining area.
  • corner of the plate designates anyone of the four corners which, in a plan view of the plate, are defined between the side edges and the front and rear edges of the plate.
  • each of the lateral edges of the plate may be a surface having two longitudinal arris or “corners”.
  • the "corner” of each lateral edge is therefore a longitudinal arris (a line), which has nothing to do with the "corner” which, in a plan view of the plate, is defined between one lateral edge of the plate and the front edge or the rear edge of the plate.
  • the bilateral machine 1 in the two sides D, S of the bilateral machine 1, downstream of the tool units U, V, W, Z (with reference to the direction of advancement of the plate L) there are integrated two radiusing devices R configured and controlled for simultaneously performing the radiusing operation of the two head corners C1 of plate L in a first step, and the radiusing operation of the two trailing corners C2 of plate L in a second step.
  • the result of this machining operation is a glass plate L having radiused corners C1', C2', as shown for example in figure 2 .
  • each of the two radiusing devices R provided on the two sides of the machine includes a fixed supporting bench 10 on which the structure of a slide 11 is slidably mounted along direction X.
  • the slide 11 extends transversally with respect to the supporting bench 10 both on its side facing towards the machining area A through which the plate L is moved, and on its opposite outer side.
  • the front of each slide 11 carries two abutments 13, 12 for engaging the plate (that are visible in figure 4 ) which are respectively for cooperation with the front edge LF and with the rear edge LP of the plate, in a way which will become clear in the following.
  • These abutments 12, 13 are movable vertically, with the aid of actuators of any type, such as pneumatic cylinders (not shown), between a raised operative position and a lowered inoperative position, in which they do not interfere with the passing plate.
  • Figure 5 shows plate L in a position in which it has not yet come to engage the two radiusing devices R, which therefore are in a waiting condition. In this condition, the plate engaging abutments 12, 13 are both lowered.
  • the radiusing device R of the exemplary embodiment illustrated herein further comprises a cam device T, P, including a cam track T and a cam-follower member P (such as in form of a wheel having a vertical axis) respectively carried by said platform 14 and said slide 11 (or vice versa).
  • Auxiliary actuating means Q1, Q2 are further provided for activating a relative movement between said cam track T and said cam-follower member P while keeping them in contact with each other, so as to give rise to the desired movement of tool M relative to plate L, during the joint advancement of the plate L and the slide 11, in order to carry out the radiusing operation.
  • said cam track T includes two symmetrical sections t1, t2 which are active respectively during the radiusing operation of a front corner C1 and during the radiusing operation of a rear corner C2 of the plate.
  • the above mentioned auxiliary actuator means comprise a pair of actuating cylinders Q1, Q2 interposed between the above mentioned slide 11 and the above mentioned platform 14 and adapted to be activated selectively so that one is shortened and the other is extended, or vice versa, for respectively generating the relative movement of the cam-follower member P on section t1 and on section t2 of the cam track T.
  • the slide 11 is brought back to a position more upstream, by activating an actuating device (not shown in the drawings) such as a pneumatic cylinder, which is provided on structure 10 and is connected to slide 11.
  • an actuating device such as a pneumatic cylinder, which is provided on structure 10 and is connected to slide 11.
  • the abutments 12, 13 are in their lowered positions, so as to enable plate L to pass above them.
  • slide 11 is moved again forwardly in the X direction by activating the above mentioned actuating device, so as to follow the plate until contact of the abutment 12 (which in the meantime has been raised) of each radiusing device R against the rear edge LP of the plate (see figure 9 ).
  • auxiliary actuators Q1, Q2 are activated so that one of them is shortened and the other one is extended, while slide 11 continues to be positively pushed by the actuator associated thereto so that it moves together with plate L.
  • Activation of the two auxiliary actuators Q1, Q2 causes relative movement between the cam track T and the cam-follower member P, with engagement of the latter on section t2 of the cam track T ( figure 10 ).
  • the tool M is moved relative to the moving plate thus performing the desired curved path.
  • the actuating cylinders can be provided with manually adjustable flow regulators for adjusting the speed of the machining operation.
  • a solution is provided having the same arrangement of the slide 11 with abutments 12 and 13, and wherein the slide 11 is also pushed by plate L during the radiusing operation of the front corners of the plate, and is positively driven by an actuator so that it moves with the plate during radiusing operation of the rear corners.
  • the cam device is not used and the tool unit is operated for its movements along the X direction and along the Y direction relative to slide 11 by two respective actuators controlled by an electronic (CNC) control unit, which is adapted to coordinate these movements for obtaining the desired path of the axis of tool M relative to the moving plate.
  • CNC electronic

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  • 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)

Description

  • The present invention relates to bilateral machines for machining edges of plates made of glass or stone and stone materials in general, of the type including a frame which comprises two sides each provided with a plurality of machining units and defining therebetween a machining area through which a plate to be machined is caused to advance, wherein the machining units on the two sides of the machine are adapted to perform a machining operation of the two lateral edges of the plate while the latter advances through the machining area.
  • A machine according to the preamble of claim 1 is known from DE 3010724 A1 . In this known machine, on each side of the machine two different devices are provided to machine front and rear corners of a plate, on one side of the plate, so as to impart a circular radiused profile to each corner of the plate. Each of these two devices has a slide movable in the longitudinal direction of the plate. Each slide is provided with a respective abutment member adapted to engage a front edge or a rear edge of the advancing plate, so that the slide is caused to advance together with the plate. On each slide, a tool unit carrying a grinding wheel tool is provided, which is movable in two orthogonal directions relative to the slide. In this manner, the grinding wheel tool can be moved relative to the plate, to impart the desired radiused profile to the plate corner, while the slide on which the tool unit is movable advances together with the plate.
  • Document EP 2 246 151 A1 discloses a machine including a corner grinding device where a tool-carrying arm, carrying the grinding wheel tool, is mounted so that it can be moved along two orthogonal directions. In this known solution, two abutment surfaces are provided for engagement of the front and rear edges of the plate respectively. However each abutment surface is provided on the tool-carrying arm and not on a slide on which the tool-carrying arm is movable in two orthogonal directions, as in the case of DE 3010724 A1 .
  • Documents JP 2003 341828 A , TW 1 418 442 B , US 2013/196576 A1 and CN 102 198 618 A disclose various devices for performing bevelling operations at any of the four corners of a plate advancing along a line.
  • The object of the present invention is that of providing a bilateral machine of the above indicated type which enables new functionalities and further types of machining operations to be integrated therein, with the advantage of greater productivity and flexibility of the plant and elimination of space and resources which otherwise would be required for providing machines dedicated to performing the above mentioned further machining operations.
  • In view of achieving this object, the invention provides a bilateral machine having the features of claim 1 and a method having the features of claim 3. In the present description and in the following claims, the expression "edge of the plate" is used to indicate anyone of the sides of the plate. In the typical case of a quadriangular plate, the expression "lateral edges of the plate" designates the two sides of the plate which are parallel to the direction of advancement of the plate along the machining area. Again in the typical case of a quadriangular plate, the expression "corner of the plate" designates anyone of the four corners which, in a plan view of the plate, are defined between the side edges and the front and rear edges of the plate.
  • It is also to be noted that each of the lateral edges of the plate may be a surface having two longitudinal arris or "corners". Naturally, the "corner" of each lateral edge is therefore a longitudinal arris (a line), which has nothing to do with the "corner" which, in a plan view of the plate, is defined between one lateral edge of the plate and the front edge or the rear edge of the plate.
  • Independently from what is the selected embodiment, the machine according to the invention is able to perform a complete grinding and radiusing machining of a plate, with a processing time lower for example with respect to that which is required by an electronically controlled machining centre adapted to perform these operations, and with optimal machining quality. The integration of a device adapted to perform radiusing of the corners of the plate within a bilateral machine enables saving of the space and resources necessary for providing machines dedicated to performing the radiusing operation only, subsequently to a conventional machining operation carried out by the bilateral machine. Therefore also dead times for transferring the plates from the bilateral machine to the machine performing the radiusing operation are also avoided, so that also productivity of the plant is improved.
  • Further features and advantages of the invention will become apparent from the following description with reference to the annexed drawings, given purely by way of non limiting example, in which:
    • figure 1 is a diagrammatic plan view of a bilateral machine according to the invention,
    • figure 2 is a perspective view of a glass plate with radiused corners, obtained by the machine of figure 1,
    • figure 3 is a diagrammatic view of a corner of the plate, which shows the mode of operating of the tool forming part of the radiusing device integrated in the machine of figure 1,
    • figure 4 is a plan view at an enlarged scale of a radiusing device according to an exemplary embodiment, and
    • figures 5-10 show different operative conditions of a radiusing device according to the solution of figure 4.
  • In figure 1, reference L generally designates a glass plate blank, of a quadriangular shape, which is caused to advance horizontally in the machining area A defined between right and left sides D, S constituting the frame of a bilateral machine 1. The two sides D, S have respective support structures each carrying a number of longitudinally aligned tool units U, V, W and Z including respective grinding wheel-tools for machining the two lateral edges LD, LS of the glass plate L, while the glass plate L is caused to advance through the machining area A by a conveyor system of any known type (not shown) such as a belt conveyor system. As in the conventional art, each of the tool units U, V, W and Z on each side of the machine is movable also in a transverse direction Y relative to the longitudinal direction X of advancement of plate L, with the aid of actuator means of known type.
  • According to the invention, in the two sides D, S of the bilateral machine 1, downstream of the tool units U, V, W, Z (with reference to the direction of advancement of the plate L) there are integrated two radiusing devices R configured and controlled for simultaneously performing the radiusing operation of the two head corners C1 of plate L in a first step, and the radiusing operation of the two trailing corners C2 of plate L in a second step. The result of this machining operation is a glass plate L having radiused corners C1', C2', as shown for example in figure 2.
  • By the expression "radiusing operation" the machining operation is meant by means of which each corner of the plate is given a rounded circular profile r1 (see figure 3). To this end, each radiusing device R comprises a grinding wheel-tool M having a vertical axis M1. According to the invention, while the plate L is advancing in direction X, tool M (see again figure 3) is moved relative to plate L both in direction X and direction Y with movements which are coordinated in such a way that the axis M1 of the tool M is moved, relative to the moving plate L, so that it follows a circular path R1 having a radius RR around a vertical axis C lying inside the perimeter of the plate L (see figure 3).
  • Naturally, the possibility is not excluded that a single radiusing device is provided only on one of the two sides of a machine. Also, it is not essential that the two radiusing devices are operated simultaneously, since it is absolutely possible that a radiused profile is formed only on one of the corners of the plate or only on some of the corners of the plate. Furthermore, it is advantageous that the radiusing devices are operated while the plate is moving, in order to obtain a minimum cycle time, but the possibility is not excluded that they are operated with the plate being in a stationary position.
  • Figures 4-10 relate to an embodiment whose description is useful for understanding the present invention. With reference initially to figures 4, 5, each of the two radiusing devices R provided on the two sides of the machine includes a fixed supporting bench 10 on which the structure of a slide 11 is slidably mounted along direction X. The slide 11 extends transversally with respect to the supporting bench 10 both on its side facing towards the machining area A through which the plate L is moved, and on its opposite outer side. On the side facing towards the machining area A, the front of each slide 11 carries two abutments 13, 12 for engaging the plate (that are visible in figure 4) which are respectively for cooperation with the front edge LF and with the rear edge LP of the plate, in a way which will become clear in the following. These abutments 12, 13 are movable vertically, with the aid of actuators of any type, such as pneumatic cylinders (not shown), between a raised operative position and a lowered inoperative position, in which they do not interfere with the passing plate.
  • Figure 5 shows plate L in a position in which it has not yet come to engage the two radiusing devices R, which therefore are in a waiting condition. In this condition, the plate engaging abutments 12, 13 are both lowered.
  • During the radiusing operation of a front corner C1 of the plate L (figures 6, 7) the abutment 13 of each device R is in a raised position and the plate L engages said abutment 13 with its front edge LF thereby causing advancement of said slide 11 in the longitudinal direction X together with the plate L, simply due to the pushing action of the plate.
  • Each radiusing device R comprises a platform 14 mounted so that it can float both in the longitudinal direction X and in the transverse direction Y above said slide 11 (for instance with the aid of an arrangement including two superimposed guides arranged in a cross, not shown in the drawings). Platform 14 carries a tool unit 15 carrying on its turn said grinding wheel-tool M having a vertical axis.
  • The radiusing device R of the exemplary embodiment illustrated herein further comprises a cam device T, P, including a cam track T and a cam-follower member P (such as in form of a wheel having a vertical axis) respectively carried by said platform 14 and said slide 11 (or vice versa). Auxiliary actuating means Q1, Q2 are further provided for activating a relative movement between said cam track T and said cam-follower member P while keeping them in contact with each other, so as to give rise to the desired movement of tool M relative to plate L, during the joint advancement of the plate L and the slide 11, in order to carry out the radiusing operation.
  • In the illustrated example, said cam track T includes two symmetrical sections t1, t2 which are active respectively during the radiusing operation of a front corner C1 and during the radiusing operation of a rear corner C2 of the plate. The above mentioned auxiliary actuator means comprise a pair of actuating cylinders Q1, Q2 interposed between the above mentioned slide 11 and the above mentioned platform 14 and adapted to be activated selectively so that one is shortened and the other is extended, or vice versa, for respectively generating the relative movement of the cam-follower member P on section t1 and on section t2 of the cam track T.
  • Figure 6 shows the initial step of the radiusing operation of a front corner C1 of the plate. Starting from this condition, while slide 11 advances along direction X, being pushed by plate L, the auxiliary actuating means Q1 and Q2 are activated so that one is extended and the other one is shortened in order to generate the relative movement between the section t1 of the cam track T and the cam-follower member P (figure 7) which generates the desired movement of tool M relative to plate L.
  • When the radiusing operation of the two front corners of the plate is terminated, the slide 11 is brought back to a position more upstream, by activating an actuating device (not shown in the drawings) such as a pneumatic cylinder, which is provided on structure 10 and is connected to slide 11. In this step, the abutments 12, 13 are in their lowered positions, so as to enable plate L to pass above them. When the trailing edge LP of the plate has passed beyond the radiusing devices (figure 8) slide 11 is moved again forwardly in the X direction by activating the above mentioned actuating device, so as to follow the plate until contact of the abutment 12 (which in the meantime has been raised) of each radiusing device R against the rear edge LP of the plate (see figure 9).
  • At this point the radiusing operation can be carried out due to that the auxiliary actuators Q1, Q2 are activated so that one of them is shortened and the other one is extended, while slide 11 continues to be positively pushed by the actuator associated thereto so that it moves together with plate L. Activation of the two auxiliary actuators Q1, Q2 causes relative movement between the cam track T and the cam-follower member P, with engagement of the latter on section t2 of the cam track T (figure 10). As a consequence, the tool M is moved relative to the moving plate thus performing the desired curved path.
  • As already indicated herein, the actuating cylinders can be provided with manually adjustable flow regulators for adjusting the speed of the machining operation.
  • According to the invention, alternatively to the embodiment illustrated herein, a solution is provided having the same arrangement of the slide 11 with abutments 12 and 13, and wherein the slide 11 is also pushed by plate L during the radiusing operation of the front corners of the plate, and is positively driven by an actuator so that it moves with the plate during radiusing operation of the rear corners. However, in this variant, the cam device is not used and the tool unit is operated for its movements along the X direction and along the Y direction relative to slide 11 by two respective actuators controlled by an electronic (CNC) control unit, which is adapted to coordinate these movements for obtaining the desired path of the axis of tool M relative to the moving plate.
  • Naturally, while the principle of the invention remains the same, the details of construction and the embodiments may widely vary with respect to what has been described and illustrated purely by way of example, without departing from the scope of the present invention defined by the appended claims.

Claims (3)

  1. Bilateral machine (1) for machining edges of plates (L) made of glass or stone and stone materials in general, including a frame which includes two sides (D, S) each provided with a plurality of machining units (U, V, W, Z) and defining between them a machining area (A) through which in use a plate (L) to be machined is caused to advance, wherein the machining units (U, V, W, Z) on the two sides of the machine are adapted to machining of the two lateral edges (LD, LS) of the plate (L) while the latter advances in a longitudinal horizontal direction (X) through the machining area (A),
    wherein within said machine (1) there is included at least one radiusing device (R) for imparting a circular radiused profile (r1) to the plate (L) at least at one corner (C1, C2) defined between two adjacent sides of the plate (L),
    wherein each radiusing device (R) further includes:
    - a fixed support structure (10),
    - a slide (11) slidably mounted in the longitudinal direction (X) above said support structure (10),
    - a first abutment (13,12) for abutting engagement with a front edge (LF) or a rear edge (LP) of the plate,
    - a platform (14) mounted so that it can float both in the longitudinal direction (X) and in a transverse horizontal direction (Y) transverse to said longitudinal direction (X), above said slide (11),
    - said platform (14) carrying a tool unit (15) on its turn carrying a grinding wheel-tool (M) with a vertical axis, so that said grinding wheel-tool (M) is displaceable in a coordinated manner both in the longitudinal horizontal direction (X), and in the transverse horizontal direction (Y) transverse to said longitudinal direction (X), in such a manner that said tool (M) is capable of following with its axis (M1), relative to the plate (L) which is advancing, a circular path (R1) around a vertical axis (C) located inside the perimeter of the plate (L),
    - said fixed support structure (10) being provided with an actuator to positively control a displacement of said slide (11) in the longitudinal direction (X),
    - in such a way that during the radiusing operation of a front corner (C1) or a rear corner (C2) of the plate (L) said first abutment (13,12) engages a front edge (LF) or a rear edge (LP) of the plate, so that the slide (11) moves in the longitudinal direction (X) unitarily to the plate (L), while the tool unit (15) is moved relative to the slide (11) along the longitudinal and transverse directions (X, Y) to perform the radiusing operation,
    said bilateral machine being characterized in that:
    - the radiusing device (R) comprises a second abutment (12) for abutting engagement with the plate, the first and second abutments (13, 12) carried by said slide (11) and intended to cooperate respectively with the front edge (LF) and with the rear edge (LP) of the plate (L),
    - wherein each of said abutments (13, 12) carried by said slide (11) is movable between a raised operative position and a lowered inoperative position relative to said slide (11),
    - in such a way that during the radiusing operation of a front corner (C1) of the plate (L) said first abutment (13) is in its raised position and the plate (L) engages with its front edge (LF) said first abutment (13) causing the advancement of said slide (11) in the longitudinal direction (X) unitarily to the plate (L), simply as a result of the pushing action of the plate, and
    - in such a way that during the radiusing operation of a rear corner (C2) of the plate (L), said second abutment (12) is in its raised position and the slide (11) is pushed by said actuator so as to bring and maintain the second abutment (12) in engagement with the rear edge (LP) of the plate, thus causing the advancement of said slide (11) in the longitudinal direction (X), unitarily to the plate (L), due to the pushing action of said actuator, and
    - said bilateral machine being further characterized in that the movements of the tool unit (15) relative to the slide (11) along the longitudinal and transverse directions (X, Y) are driven by two respective actuators controlled by an electronic numerical control unit, which is programmed to coordinate these movements so as to achieve the desired circular path (R1) of the tool axis (M1) with respect to the moving plate.
  2. Bilateral machine according to claim 1, characterized in that it comprises two radiusing devices (R) arranged on the two aforementioned sides (D, S) of the machine and configured and controlled to perform simultaneously in a first phase the radiusing operation of the two head corners (C1) of the plate and in a second phase the radiusing operation of the two trailing corners (C2) of the plate, while the plate (L) advances through the machining area (A) of said bilateral machine.
  3. Method for machining edges of plates (L) of glass or stone or stone materials, wherein a bilateral machine is provided comprising a frame which includes two sides (D, S), each having a plurality of machining units (U, V, W, Z) and defining between them a machining area (A), wherein a plate to be worked (L) is caused to advance horizontally in a longitudinal direction (X) through said machining area (A) while said processing units (U, V, W, Z) perform a machining operation of the two lateral edges (LD, LS) of the plate (L),
    wherein within said machine (1) there is included at least one radiusing device (R), so that while the plate (L) advances through said machining area (A) of the bilateral machine said radiusing device (R) engages at least one corner (C1, C2) defined between two adjacent sides of the plate (L) to impart a radiused circular profile (r1) to it,
    wherein each radiusing device (R) further includes:
    - a fixed support structure (10),
    - a slide (11) slidably mounted in said longitudinal direction (X) above said support structure (10),
    - a first abutment (13,12) for abutting engagement with a front edge (LF) or a rear edge (LP) of the plate,
    - a platform (14) mounted so that it can float both in the longitudinal direction (X) and in a transverse horizontal direction (Y) transverse to said longitudinal direction (X) above said slide (11),
    - said platform carrying a tool unit (15) on its turn carrying a grinding wheel-tool (M) with a vertical axis, so that said grinding wheel-tool (M) is displaced in a coordinated manner both in the longitudinal horizontal direction (X), and in the transverse horizontal direction (Y) in such a manner that said tool (M) is capable of following with its axis (M1), relative to the plate (L) which is advancing, a circular path (R1) around a vertical axis (C) located inside the perimeter of the plate (L),
    - said support structure (10) being provided with an actuator to positively control a displacement of said slide (11) in the longitudinal direction (X),
    - in such a way that during the radiusing operation of a front corner (C1) or a rear corner (C2) of the plate (L) said first abutment (13,12) engages a front edge (LF) or a rear edge (LP) of the plate, so that the slide (11) moves in the longitudinal direction (X) unitarily to the plate (L), while the tool unit (15) is moved relative to the slide (11) along the longitudinal and transverse directions (X, Y) to perform the radiusing operation,
    said method being characterized in that:
    - the radiusing device (R) comprises a second abutment (12) for abutting engagement with the plate, the first and second abutments (13, 12) being carried by said slide (11) and intended to cooperate respectively with the front edge (LF) and with the rear edge (LP) of the plate (L),
    - each of said abutments (13, 12) is movable between a raised operative position and a lowered inoperative position relative to said slide (11),
    - during the radiusing operation of a front corner (C1) of the plate (L) said first abutment (13) is in its raised position and the plate (L) engages with its front edge (LF) said first abutment (13) causing the advancement of said slide (11) in the longitudinal direction (X) unitarily to the plate (L), simply as a result of the pushing action of the plate, and
    - during the radiusing operation of a rear corner (C2) of the plate (L), said second abutment (12) is in its raised position and the slide (11) is pushed by said actuator so as to bring and maintain the second abutment (12) in engagement with the rear edge (LP) of the plate, thus causing the advancement of said slide (11) in the longitudinal direction (X), unitarily to the plate (L), due to the pushing action of said actuator of said slide (11), and
    - while the slide (11) moves unitarily to the plate (L), the movements of the tool unit (15) relative to the slide (11) along the longitudinal and transverse directions (X, Y) are driven by two respective tool unit actuators controlled by an electronic numerical control unit, which is programmed to coordinate these movements so as to achieve the desired path of the tool axis (M1) with respect to the moving plate.
EP15186794.2A 2014-10-20 2015-09-25 Bilateral machine for machining edges of plates with integrated corner radiusing devices Active EP3012066B1 (en)

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CN108747683B (en) * 2018-07-04 2019-12-03 浙江华力管业有限公司 A kind of automatic edger unit of optical glass
CN112692695A (en) * 2020-12-24 2021-04-23 芜湖恒坤汽车部件有限公司 Multi-surface polishing machine for copper bar modification
CN114986320A (en) * 2022-08-03 2022-09-02 苏州科思拓机械科技有限公司 Straight edge grinding machine for photovoltaic glass

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