EP0296390A2 - Schleifmaschine zum Gravieren von Glas, Spiegeln und dergleichen - Google Patents

Schleifmaschine zum Gravieren von Glas, Spiegeln und dergleichen Download PDF

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Publication number
EP0296390A2
EP0296390A2 EP88108771A EP88108771A EP0296390A2 EP 0296390 A2 EP0296390 A2 EP 0296390A2 EP 88108771 A EP88108771 A EP 88108771A EP 88108771 A EP88108771 A EP 88108771A EP 0296390 A2 EP0296390 A2 EP 0296390A2
Authority
EP
European Patent Office
Prior art keywords
sheet
grinding
machine according
bearing table
head
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP88108771A
Other languages
English (en)
French (fr)
Other versions
EP0296390A3 (de
Inventor
Luigi Poli
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.)
Vetraria Poli Di Poli Luigi & C SNC
Original Assignee
Vetraria Poli Di Poli Luigi & C SNC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vetraria Poli Di Poli Luigi & C SNC filed Critical Vetraria Poli Di Poli Luigi & C SNC
Publication of EP0296390A2 publication Critical patent/EP0296390A2/de
Publication of EP0296390A3 publication Critical patent/EP0296390A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/02—Frames; Beds; Carriages

Definitions

  • the present invention relates to a grinder for engraving sheet material such as glass, mirrors and the like.
  • Grinders for engraving sheet materials which to perform curved or elliptical engravings on said sheet materials must use appropriate templates are known in the art. Such grinders, however, require long idle times, with consequent decrease in productivity and great ability on the part of the operator.
  • An object of the present invention is to provide a grinder for engraving sheet materials to obtain engravings of fillets, both continuous and discontinuous and either rectilinear or curved, according to various configurations, without using a template.
  • Another object of the present invention is that said grinder operates with high precision, reliability and productivity.
  • a grinder for engraving sheet materials comprising a support frame, a sheet-bearing table, a grinding head movably carried above the sheet-bearing table, and a beam carrying the grinding head and mounted on the frame so as to be able to move backwards and forwards in a direction parallel to the laying of the sheet-bearing table, the said sheet-­bearing table being rotatable about an axis normal to the direction of movement of both the beam and the grinding head.
  • a grinder 1 for sheet products has a support frame including four uprights (one pair 2 on the left side and one 3 on the right side in Figure 1) and intermediate stiffening crosspieces 4 mutually connecting the uprights 2 and 3.
  • Each pair of uprights 2 and 3 is bridge-like connected at its top by a respective horizontal stringer 5, 6 on each of which a slide 9, 10 is slidably mounted, e.g. on guides 7 and/or rollers 8.
  • Each slide 9, 10 supports one end of a beam 12 which can thus move back and forth along the stringers 5 and 6 on a horizontal plane.
  • a grinding head 14 comprising four grinding wheels 15, 16, 17 and 18 arranged one after the other aligned in the direction of the beam 12.
  • Each grinding wheel similarly to the grinding wheel 15 shown in Figure 3, is rotatably mounted about its own axis 19 and is operatively connected, e.g. by means of a toothed belt 20, to a geared motor 21.
  • each grinding wheel is carried on a structure 23 which is, in turn, mounted vertically slideable against the action of one or two springs 24 on two guides supported, in turn, by a bracket 26.
  • the latter can perform lifting/lowering movements under the control of a respective fluid-operated jack 27 fixed to a supporting structure 28 which is, in turn, adjustable in height by means of one or two lifting/lowering screws 29 (that can be motor-driven) with respect to a carriage or slide 30 movable along the guides 13 along the beam 12.
  • Both the slides 9 and 10 and the carriage or slide 30 can move back and forth along their guide supports, e.g. by means of a respective rack-and-pinion assembly, not shown in the drawings where a motor 31 for actuating the slide 30 is shown in Figure 1.
  • the head 14 can move to any position within the range of movement of the beam.
  • a sheet-bearing table 32 which is mounted for rotation about a horizontal axis x-x which is perpendicular to the directions of motion of both the carriage or slide 30 and the slides 9 and 10.
  • the table 32 can be controllably rotated by a control unit 34, e.g. a reversible geared motor, which also actuates a center plate (not shown) rigid with the table 32.
  • the table 32 has a workplane 35 where a plurality of recesses 36 are provided whose bottom wall in formed with a hole 37 in communication with a suction and compression unit (not shown) arranged to suck air while a sheet or plate 33 is laid on the workplane, whereby each recess 36 acts as suction cup for holding down the sheet, and to feed compressed air after the same sheet has been ground to ensure its removal from the work and support plane 35.
  • a suction and compression unit not shown
  • a graduated positioning bar or ruler 38 which is slidably mounted on two parallel guides 39 each arranged on a respective opposite side of the table 32, and can be controlled by means of two fluid-operated jacks 40.
  • the operation of the above described grinder is as follows. Once a sheet or plate 33 to be machined has been placed on the worktable 32, it is held and retained in position by the suction cups or cavities 36. Before the grinding wheels 15-18 are set in rotation, the operator must make sure, if necessary, by acting on the raising-­lowering screws 29, that the same are arranged slightly (a few millimeters) above the sheet, then the grinding head 14 is moved so as to move the grinding wheel 15 at the beginning of the engraving to be made. If a rectilinear engraving is to be obtained, the grinding wheel 15 is set in rotation and is simultaneously lowered by its respective jack 27 onto the sheet or plate 33 to start the machining operation.
  • the slide or carriage 30 starts to advance along the beam 12 from right to left (when viewing Figure 1) to ensure the feed motion.
  • the grinding wheel 18 is set in rotation and lowered onto the sheet, and thus it will start working precisely at the beginning of the engraving produced by the grinding wheel 15.
  • the other grinding wheels 17 and 18, which thus perform a total of four passes (one for each grinding wheel) for each engraving.
  • the respective grinding wheel is lifted away from the sheet 33 and comes to a standstill in reverse sequence with respect to the start.
  • the grinding wheel 15 must first be moved to starting point of the curved pass to be made, the unit 34 is then energized and at the same time the grinding wheel 15 is set in rotation and performs the first pass along a curved path on the sheet or plate on the table 32.
  • a path is determined and will have a configuration depending on the mutual position and the relative movement of the head 14 with respect to the table 32.
  • the second pass is performed by the grinding wheel 16, but during the return rotation movement of the table 32 and, possibly, during the return stroke of the head 14; the third pass is performed by the grinding wheel 17 which operates likewise the grinding wheel 15, by causing a new advancement of the head-­table 32; then the fourth pass by the grinding wheel 18 occurs likewise the second pass of the grinding wheel 16.
  • Operational and functional control of the various movements of the carriage 30, the slides 9 and 10, the grinding wheels 15 to 18 and the table 32 is advantageously performed by a central unit (not shown) controlled by a computer, and thus the grinder 1 requires minimum supervision by a single operator.
  • a grinder for engraving sheet products such as that described above is susceptible to numerous modifications and variations within the scope of the inventive concept as defined by the appended claims.
  • the grinding wheels 15 to 18 may be mounted on a respective axis or mandrel 19 in pairs 18A and 18B as shown in Figure 4.
  • the grinding tool 18 comprises a single grinding wheel designed to perform the last pass
  • the same is advantageously mounted ( Figure 4) between two springs 40 and 41 mounted on the mandrel 19 to allow small axial movements in a horizontal direction for the grinding wheel or wheels 18 to compensate for any small defects in alignment between, and differences in wear among, the grinding wheels thereby obtaining engravings with perfectly machined sides.
  • the grinding machine can be provided with a whole range of accessories, e.g. a system for feeding water under each grinding wheel during an engraving operation.
  • a millimeter-graduated bar 44 can be provided above the beam 12 on which reference lugs 45 are slideably arranged which have the function of stroke start or end for the working head 14, for example because they are arranged to abut against switches 46, one for each grinding wheel, adapted to send a specific control impulse to the central control unit.
  • the central unit may also be programmed to perform discontinuous interrupted engravings, in which case the grinding wheels 15-18 rise and lower in sequence at each engraved section owing to the action of a respective jack 27.
  • a grinding wheel dresser removably fixed to the table 32 and against which the grinding wheels 15-18 can act in sequence, e.g. to give them a desired face angle or to true them.
  • a grinder according to the invention is particularly suitable for obtaining engravings on glass sheets, mirrors and the like, although it can be used for machining a large number of sheet or plate products, including stone slabs, tiles and the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
EP88108771A 1987-06-25 1988-06-01 Schleifmaschine zum Gravieren von Glas, Spiegeln und dergleichen Withdrawn EP0296390A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8495087 1987-06-25
IT8784950A IT1214301B (it) 1987-06-25 1987-06-25 Macchina molatrice per incisione di vetri, specchi e simili.

Publications (2)

Publication Number Publication Date
EP0296390A2 true EP0296390A2 (de) 1988-12-28
EP0296390A3 EP0296390A3 (de) 1990-07-04

Family

ID=11326321

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88108771A Withdrawn EP0296390A3 (de) 1987-06-25 1988-06-01 Schleifmaschine zum Gravieren von Glas, Spiegeln und dergleichen

Country Status (3)

Country Link
EP (1) EP0296390A3 (de)
JP (1) JPS6420963A (de)
IT (1) IT1214301B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0424815A1 (de) * 1989-10-23 1991-05-02 Z. BAVELLONI S.p.A. Automatische Graviermaschine, insbesondere zum Gravieren der Seiten von flachen Elementen im allgemeinen und von Glasplatten im besonderen
WO1991016174A1 (en) * 1990-04-18 1991-10-31 De Monfort University Apparatus for brilliant cutting of glass
CN116900909A (zh) * 2023-09-08 2023-10-20 华能太原东山燃机热电有限责任公司 一种光伏电缆端头抛光装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112643478B (zh) * 2021-01-19 2022-08-23 浙江广一玻璃有限公司 一种多层化工玻璃槽加工装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH398354A (de) * 1959-11-07 1966-03-15 Colombi Luigi Vorrichtung zum Schleifen und Polieren von Kunst- und Natursteinen
BE680897A (de) * 1966-03-12 1966-10-17
FR2548073A1 (fr) * 1983-06-17 1985-01-04 Oliva Isabel Perfectionnement dans les machines debiteuses et polisseuses a pont pour planches de marbre, granits et pierres en general
FR2569599A1 (fr) * 1984-09-06 1986-03-07 Nippon Sheet Glass Co Ltd Appareil de polissage de tranches d'objets plats, notamment de verre
WO1987001321A1 (en) * 1985-09-10 1987-03-12 Alan Frederick Lindsey Production of polished flat glass
WO1988002298A1 (en) * 1986-09-23 1988-04-07 G.L.C. Di Ceriotti Gino Process and machine to engrave the main surfaces of a pane of glass with slightly deep grooves

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH398354A (de) * 1959-11-07 1966-03-15 Colombi Luigi Vorrichtung zum Schleifen und Polieren von Kunst- und Natursteinen
BE680897A (de) * 1966-03-12 1966-10-17
FR2548073A1 (fr) * 1983-06-17 1985-01-04 Oliva Isabel Perfectionnement dans les machines debiteuses et polisseuses a pont pour planches de marbre, granits et pierres en general
FR2569599A1 (fr) * 1984-09-06 1986-03-07 Nippon Sheet Glass Co Ltd Appareil de polissage de tranches d'objets plats, notamment de verre
WO1987001321A1 (en) * 1985-09-10 1987-03-12 Alan Frederick Lindsey Production of polished flat glass
WO1988002298A1 (en) * 1986-09-23 1988-04-07 G.L.C. Di Ceriotti Gino Process and machine to engrave the main surfaces of a pane of glass with slightly deep grooves

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0424815A1 (de) * 1989-10-23 1991-05-02 Z. BAVELLONI S.p.A. Automatische Graviermaschine, insbesondere zum Gravieren der Seiten von flachen Elementen im allgemeinen und von Glasplatten im besonderen
WO1991016174A1 (en) * 1990-04-18 1991-10-31 De Monfort University Apparatus for brilliant cutting of glass
CN116900909A (zh) * 2023-09-08 2023-10-20 华能太原东山燃机热电有限责任公司 一种光伏电缆端头抛光装置
CN116900909B (zh) * 2023-09-08 2024-02-02 华能太原东山燃机热电有限责任公司 一种光伏电缆端头抛光装置

Also Published As

Publication number Publication date
EP0296390A3 (de) 1990-07-04
JPS6420963A (en) 1989-01-24
IT1214301B (it) 1990-01-10
IT8784950A0 (it) 1987-06-25

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