Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B44—DECORATIVE ARTS
  • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
  • B44B3/00—Artist's machines or apparatus equipped with tools or work holders moving or able to be controlled substantially two- dimensionally for carving, engraving, or guilloching shallow ornamenting or markings
  • B44B3/06—Accessories, e.g. tool or work holders
  • B44B3/065—Work holders
• • 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
  • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
  • B24B19/02—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements
  • B24B19/03—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements for grinding grooves in glass workpieces, e.g. decorative grooves
• • 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
  • B24B27/0061—Other grinding machines or devices having several tools on a revolving tools box
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B44—DECORATIVE ARTS
  • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
  • B44B3/00—Artist's machines or apparatus equipped with tools or work holders moving or able to be controlled substantially two- dimensionally for carving, engraving, or guilloching shallow ornamenting or markings
  • B44B3/006—Artist's machines or apparatus equipped with tools or work holders moving or able to be controlled substantially two- dimensionally for carving, engraving, or guilloching shallow ornamenting or markings carving or engraving devices having several cutting tools
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B44—DECORATIVE ARTS
  • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
  • B44B3/00—Artist's machines or apparatus equipped with tools or work holders moving or able to be controlled substantially two- dimensionally for carving, engraving, or guilloching shallow ornamenting or markings
  • B44B3/009—Artist's machines or apparatus equipped with tools or work holders moving or able to be controlled substantially two- dimensionally for carving, engraving, or guilloching shallow ornamenting or markings using a computer control means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B44—DECORATIVE ARTS
  • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
  • B44B3/00—Artist's machines or apparatus equipped with tools or work holders moving or able to be controlled substantially two- dimensionally for carving, engraving, or guilloching shallow ornamenting or markings
  • B44B3/06—Accessories, e.g. tool or work holders
  • B44B3/061—Tool heads

Definitions

• the present invention relates to a process and a machine to engrave the main surface's, of the pane of glass, with grooves, slightly deep, possibly blind, according, mixtilinear designs including also curves, circumferences and the like, and combinations and repetitions thereof. It is also an object of the present invention the pane of glass obtained with such process and machine.
• the machines to engrave the main surfaces of the pane of glass with grooves, slightly deep, provides only rectilinear grooves and are substantially characterized by the movement of pane of glass with respect to the engraving tools, which tools provide a battery, comprising at least three members, in series.
• the possibility to obtain designs, with particular ornamental or practical effects, in such a limited field, were scarce, above all in consideration of the increasing demand of glass products, similar to those of once, when this workings were handmade, substantially without any limitation as variety of designs.
• the reasons of this poorness of the known machines, is to be found in the difficulty to lead more tools, exactly on the same track, more than once using the same tools, in parallel, i.e. with the chance to intervene in further times.
• each groove must be at least rough-engraved, with at least one tool and at least smooth finished, with at least another tool, the use of two tools for each step being of course advantageous.
• the invention as claimed is intended to remedy these drawbacks. It solves the problem of how engrave the main surfaces of the pane of glass with grooves, slightly deep, possibly blind, according mixtilinear, repetitive designs, and combinations thereof, whereby a machine tool, with at least three shafts, contemporaneously rotatable, in the form of a revolver, substantially in parallel and exactly one for rough-engraving and two for finishing or vice versa, working in succession, one after the other, each driven to repeat, exactly, the same track, from the beginning to the end, with reverse to the starting point.
• the pivot of the grinding wheel tool revolver is horizontally mounted, substantially radial, to a platform, pivoted around a revolvable chariot, about a radius to be controlled by hand, by an hand-wheel and a screw or the like, a saddle, mounted with sliding arrangement on said chariot, adapted to position the revolver of grinding wheels at a distance, from the stationary axis, of rotation of the platform, corresponding to that chosen as radius, wherein the platform, in turn, is mounted on a transverse chariot, which, in turn, is mounted, by guides, on a longitudinally movable slide which carries each and all the tools longitudinally to run the pane of glass to be worked.
• the transverse chariot (4) provides, by hand, only the starting point from which the tool begins its work, as the relative transverse feeding movement, between the tool and the pane of glass is obtained by positioning the latter, as the same pane of glass is laid down on a table, with cupping glass, which fasten it thereto and the latter is transversely movable by a driven screw on guides thereof.
• the driving system powering the machine comprises seven electric motors and is associated to the pneumatic system for driving an eighth pneumatic alternative motor.
• the pneumatic system for driving the pneumatic, alternative, cylinder-piston-like motor, comprises a racket which meshes with a pinion keyed on an idly pivoted shaft which has fixedly mounted a sprocket wheel, connected to a roller chain meshing with a sprocket wheel coaxially mounted as a free wheel on the shaft of revolver tool carrier and that the same pneumatic motor works in conjunction with two rectilinear motors providing the fastening of the revolvable tool carrier during stoppings and the corresponding releasings during the temporary steps of revolution thereof.
• the machine is provided with manual and semiautomatic controls, wherein the semiautomatic ones are set on a keyboard connected with a computer, included therein which complies at least with the task to lead, any of the tools, exactly along the same track.
• the PLC comprises an analogic base unit, with an extendible memory up to at least 4 Kwords residing in epron, e.g. corresponding to Hitachi P 250 E model, as well as twenty- four output connections and thirty input connections; by an expansion module, e.g. Hitachi EXBE model, comprising an input expansion module as well as four modules, for quick counting, e.g. of the XECUA model; two analogic output modules, e.g., of the Hitachi YEAGB model, providing the d.c. driving of motors.
• the computer included has the task to lead the tools exactly on the same track, however it can provide important functions such as the storage of programs of modular and elementary tracks.
• the inventor has devised twelve modular elementary tracks by composition of which substantially any design may be obtained.
• each program involving angular turnings exceeding such angle, is started by reversing of the same angle of 180[, thus, even turning of 360[, do not involve angular turnings in both directions of more than a straight angle.
• the execution of a continuous track, including more arcs starts with the work of such arc and goes on, with other steps, both rectilinear or arched, always by reverse balancing the rotations so as to provide a round angle.
• Figure 1 is a perspective view of a machine, according to the present invention, in intermediate position of setting and stroke. Some parts thereof are broken away and/or shown in cross-section, for clearness of drawings.
• Figure 2 is a detailed perspective view of the shafts- carrier unit and inherent pivot determining the revolution radius of the tools. Also here some parts thereof are broken away and/or shown in cross-section, for clearness of drawings.
• Figure 3 is the electric system sketch of the machine for actuation of the process.
• Figure 4 is a flow chart giving a general idea of machine operation.
• Figure 5 shows the paradigm of twelve substantially elementary tracks, from A to N Cosmetic obtainable by setting a few keys on the keyboard of the machine.
• a machine to engrave the main surfaces of panes of glass comprises, conventionally, a frame 1, extending substantially upright, which supports, at the bottom, a flat table 2, and at the top a beam 3, extending substantially over the table 2 and provided with guides 3'.
• a slide 4 is mounted which is provided with the operating tools 50, 50', 50", generally three or more.
• the three shafts 5, 5', 5", respectively, carrying the grinding wheels 50, 50', 50" are contemporaneously rotatable around their axis and are arranged to revolve on the revolver 05. They are there mounted, substantially in parallel, and exactly one of them, 50, is devoted to rough-engraving and two 50*, 50" to finishing or vice versa. They work, in succession, one after the other, driven to repeat, correctly, the same track, from the beginning to the end, with operating reverse to the starting point generally at A.
• the pivot 51 of the revolver 05 of the grinding wheels is horizontally mounted on a slide 160 i.e.
• a revolvable chariot 60 substantially radial, to a revolvable chariot 60, according to a radius to be controlled, by a hand-wheel 60'.
• the battery of three grinding wheels 50, 50', 50" it can be positioned at a distance, from the fixed axis 106, wherein the platform 6 is pivoted, corresponding to that chosen as a radius.
• This platform 6, is mounted, in turn, on a transverse chariot 06 which, in turn, is mounted, by the guides 61, on the longitudinal slide 4, which carries, each and all the tools to engage, longitudinally, the pane of glass to be worked, not shown.
• the transverse chariot 4 is adapted only to position, by hand, the starting point, from which the tool 50 must begin its working.
• the relative, transverse feeding, between the tool 50, 50', 50" and the pane of glass,not shown, or the table 2 is obtained by moving the latter, as the same pane of glass is laid on the top thereof, with cuppings 20 which keeps it stationary.
• the latter can be transversely moved, as it is mounted, on guides 21, in such direction, by a screw 22 driven by motor 71.
• the device is driven by seven electric motors 71, 72, 73, 74, 75, 76, 77 and comprises a pneumatic system, not shown, for driving an eighth pneumatic, alternative, motor 78, in the form of cylinder - piston.
• the pneumatic motor 78 is provided with a racket 178, which meshes with a pinion 278, keyed on an idly pivoted shaft 378, which has fixedly mounted a sprocket wheel 478, connected to a roller chain 578, meshing with a sprocket wheel 678, coaxially mounted as a free wheel, fixedly mounted on the shaft 51.
• the machine comprises a control board 0, including the electronic computer, including twofold : manual and semiautomatic controls.
• the semiautomatic ones are set on a keyboard 8, which controlled by a PLC, 80, included, which provides at least the driving, of the three tools 50, 50', 50", precisely, along the same track.
• a PLC PLC
• the platform 6 of revolution carries the electric 66, hydraulic 66 f and pneumatic 66 connections, which cannot undergo angular twists, generally of more than 180[, each program, involving angular turnings exceeding such angle, is started by reversing of the same angle of 180[, thus, even turning of 360[, do not involve angular turnings in both directions of more than a straight angle.
• the execution of a continuous track starts with the work of such arc and goes on, with other steps, both rectilinear or arched, always by reverse balancing the rotations so as to provide a round angle.
• the PLC, 80 (figure 4) comprises an analogic base unit (80'), with an extendible memory (80") up to at least 4 Kwords residing in epron, e.g. corresponding to Hitachi P 250 E model, as well as twenty-four output connections and thirty input connections; by an expansion module, e.g. Hitachi EXBE model, comprising an input expansion module as well as four modules, for quick counting, e.g. of the XECUA model; two analogic output modules, e.g., of the Hitachi YEAGB model, providing the d.c. driving of motors (71, 72, 73, 74).
• an analogic base unit 80'
• an extendible memory 80" up to at least 4 Kwords residing in epron, e.g. corresponding to Hitachi P 250 E model, as well as twenty-four output connections and thirty input connections
• an expansion module e.g. Hitachi EXBE model
• two analogic output modules e.g., of the
• the track G to be cut, comprises a continuous path, including two semicircular arcs, of radius r and two rectilinear segments
• positioning of the starting point must be preceded by setting of radius r, of curvature thereof, which is obtained by controlling the hand wheel 60', setting a distance, between the axis of the platform 6 and the plane of symmetry of the grinding wheel 50, equivalent to the radius r.
• the control board 0 are set: 1) the lengths of the rectilinear segments of the track G; 2) the degree of finishing: rough or smooth; 3) the cut depot giving, for each tool, the corresponding quote of descent.
• the cycle is started, by setting into rotation motors 72, 73, 74, 75.
• the motor 75 provides the rotation of all the tools
• the motor 74 rotates the platform 6 including the tool unit 05, in anticlockwise direction, of an angle of 180[.
• the motor 73 begins to provide the descent of the first tool 50, to a partial corresponding depth. With this descent, initiates the engraving of the pane of glass, by the tool 50, firstly in a vertical direction, at least until the motor-reduction unit 74 is involved, whereby providing the rotation of the platform 6 and correspondingly, the revolution, in clockwise direction, by radius r, of the tool 50 whereby an inherent cut with the depth determined by the tool 50, is obtained in the pane of glass, not shown.
• the driving motor 74 which provided it stops and in its place intervenes the motor 72, which slides the slide 4, as well as the tool 50, along the first rectilinear segment adjacent the track G. When this segment of the track G is ended the preceding cycle is contrarily repeated, with stopping of the motor 72 and restart of motor
• the first step has came to an end and a second step can be started.
• the second step substantially repeats the first one, in anticlockwise direction, i.e. starting from a rectilinear segment of the track G and exactly from the last segment thereof.
• this second step takes place consecutively, by the same tool 50.
• the tool 50 is given up and in its place intervenes the tool 50'. This substitution takes place substantially in three times.
• motor 73 In a first time, motor 73 is set into operation, with an inverted direction of rotation, with respect to the previous one; this takes off the tool from the pane of glass and rises it over the same, in a position wherein , the pneumatic motor 78 is expected to intervene for the second step.
• Compressing of pneumatic motor 78 results in an opening of rectilinear motors 078, 078', whose shoes, by, closing, keep stationary, the position of revolution of revolver 05, while the stroke of the racket 178 provides the final rotation of 120 [ of shaft 51 and consequently of revolver 05, which corresponds to the pitch, between a grinding wheel and the next, in this case: between the grinding wheel 50 and the grinding wheel 50'; Then, the shoes 078, 078' are closed fastening the position of revolver 05 and thus that of tool 50'.
• the motor 73 with a still inverted rotation, provides the level established for this second tool (50'), which was said of second rough-engraving or first finishing.
• this second step begins the third step which is of smooth finishing too, and which substantially repeat the second step, including the substitution of the grinding wheel 50' with the grinding wheel 50" .
• an additional back stroke is performed with the meaning of further additional finishing.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
• Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=11323602

Family Applications (2)

Family Applications After (1)

Country Status (3)

Cited By (1)

Families Citing this family (15)

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• 1986
  • 1986-09-23 IT IT83646/86A patent/IT1201847B/it active
• 1987
  • 1987-09-22 WO PCT/EP1987/000540 patent/WO1988002298A1/en not_active Application Discontinuation
  • 1987-09-22 EP EP87906410A patent/EP0294400A1/de not_active Withdrawn
  • 1987-09-22 EP EP87201963A patent/EP0301136A1/de active Pending

Non-Patent Citations (1)

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