WO2020065688A1 - Unité de meulage - Google Patents

Unité de meulage Download PDF

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Publication number
WO2020065688A1
WO2020065688A1 PCT/IT2019/050206 IT2019050206W WO2020065688A1 WO 2020065688 A1 WO2020065688 A1 WO 2020065688A1 IT 2019050206 W IT2019050206 W IT 2019050206W WO 2020065688 A1 WO2020065688 A1 WO 2020065688A1
Authority
WO
WIPO (PCT)
Prior art keywords
motor
grinding unit
rotating
cam means
central
Prior art date
Application number
PCT/IT2019/050206
Other languages
English (en)
Inventor
Giovanni Tupini
Rosario LO PICCOLO
Roberto De Toni
Guido Roman
Original Assignee
Giovanni Tupini
Lo Piccolo Rosario
Roberto De Toni
Guido Roman
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 Giovanni Tupini, Lo Piccolo Rosario, Roberto De Toni, Guido Roman filed Critical Giovanni Tupini
Priority to EP19787479.5A priority Critical patent/EP3856457B1/fr
Publication of WO2020065688A1 publication Critical patent/WO2020065688A1/fr

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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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/04—Headstocks; Working-spindles; Features relating thereto
    • B24B41/047—Grinding heads for working on plane surfaces
    • B24B41/0475—Grinding heads for working on plane surfaces equipped with oscillating abrasive blocks, e.g. mounted on a rotating head

Definitions

  • the present invention relates to a grinding unit.
  • the present invention relates to machines or devices designed for the grinding of surfaces of inorganic material flat, for example, stone, ceramic, porcelain.
  • the present invention relates to grinding heads to work on flat surfaces provided with oscillating abrasive blocks mounted on a rotating head.
  • IT patent 1,175,191 B concerning a head comprising a certain number of grinding wheels with oscillating sectors mounted on pins fixed to a watertight rotating casing with a central shaft fixed by flange to the machine, a rotating tilted disk engaged with peripheral clamps further pins that rotate the pins integral with the oscillating sectors by means of levers to make them oscillate during the rotation of the head.
  • US patent 5,339,569 A concerning a device for treating the surface of objects by grinding, polishing and deburring, comprising a conveyor belt of the objects to be treated, a grinding unit disposed on top of a grinding body parallel to the conveyor belt, a grinding body support rotatably driven by a first motor around at least two crankshafts in a plane parallel to the conveyor belt.
  • a transmission system allows moving the grinding body support in an oscillating movement with respect to the conveyor belt.
  • a second motor rotates a pinion and then a chain to rotate central support.
  • the abrasive surface disposed on the lower side of the grinding body support undergoes a combined movement, ie a rotary and oscillating movement, which extends over the entire width of the conveyor belt favouring optimal processing of the surface of the objects located on the convenyor belt.
  • DE patent 4 408 560 C2 concerning a polishing head with abrasive segments for the surface treatment of natural and artificial stone that can be guided by means of a shaft with a grinding concentric wobble ring guided in a plane tilted with respect to the plane perpendicular to the shaft of grinding, with at least one spherical joint corresponding to the number of segments in the wobble ring for guiding bolts of abrasive segments in response to a predetermined angle.
  • IT1,175,191 B allows transmitting a high power of interaction of the tool on the material to be treated, by virtue of a large number of teeth in which the internal toothed gears are gripped.
  • a gear transmission with internal toothing, hypocycloidal or epicycloidal, such as that used in the head of IT 1,175,191 B does not allow the transmission ratio to be modified and therefore does not allow to vary the amount of the oscillating contribution with respect to the progressive one of the tool, except for disassembling the head to replace at least the eccentric idler wheel.
  • a polishing head as that of DE 4 408 560 C2 comprises a concentric wobble ring driven in a plane inclined with respect to the plane perpendicular to the shaft of grinding according to a preset value of the amount of angular travel of abrasive segments.
  • the solution of DE 4 408 560 C2 does not allow any type of variation of the angular amplitude of the abrasive segments leaving unresolved the problem of correlating the angular stoke with the size of the abrasive segments.
  • the object of the present invention is that of not using a permanent cover provided with a first internally toothed crown, but a rotating casing adapted to drag a certain number of grinding wheels with radial oscillating sectors with a lever, a non-idle and not-provided cam of a second crown wheel internally coaxial to the rotating casing, but a rotary cam through the motion of a central shaft coaxial to the rotating casing, without externally eccentric toothed wheel with correction, a first motor connected to the rotating casing and a second motor connected to the rotating cam to allow diversification of the movement of the rotating casing with respect to that of the rotating cam obtaining a fast rotation of the rotating casing and a slow oscillation of the wheels with radial oscillating sectors, a control system able to diversify the contribution of the two movements in real time.
  • a further object is that of being able to adjust the law of motion of the tool which is a function of the speed difference of the rotating cam and of the rotating casing, in other words, with the same speed of the rotating cam and that of the rotating casing the tool resulting free of oscillating motion.
  • a further object is to simplify the mechanical construction of the head eliminating the transmission of wheels and toothed crowns.
  • a further object is practically that of starting conceptually from a head such as that of IT 1,175,191 B to create a sort of eccentric idle external toothed wheel with correction, in which this correction is made variable through a controlled actuator.
  • a further purpose is that of being able to adjust the angular excursion of the tool as a function of geometric parameters such as the dimensions of the tool and physical-chemical materials to increase the efficiency of the machining.
  • a further object is practically that of starting conceptually from a head such as that of DE 4 408 560 C2 to create a sort of concentric wobble ring guided in an inclined plane said ring able to modify the trim of this inclined plane by means of a controller.
  • a first advantage of the invention as appears from the enclosed claims is that of being able to determine a series of dragging speed to oscillate the abrasive blocks as a function of the nature of the material to be worked, offering a method of distribution of the pivoting motion with respect to continuous motion of the tool.
  • a second advantage is that of being able to provide a grinding unit without gear contributing to lower considerably mechanical friction increasing the overall efficiency of the process.
  • Another advantage regards the possibility of reducing the costs of manufacture of a grinding unit with a mechatronic architecture.
  • FIG. 1 is a functional diagram of a first embodiment of the grinding unit according to the present invention
  • FIG. 2 is a functional diagram of a second embodiment of the grinding unit according to the present invention
  • FIG. 3 is a functional diagram of a third embodiment of the grinding unit according to the present invention
  • FIG. 4 shows a front view of the first embodiment of the grinding unit according to the present invention
  • FIG. 5 shows a section view according to the line V-V of view of the previous figure
  • FIG. 6 shows a perspective view of the first embodiment of the grinding unit according to the present invention
  • FIG. 7 shows an important component belonging to the FIG. 5.
  • a grinding unit 100 comprises a rotating head 10 provided with abrasive oscillating blocks B mounted on tool supports 11 connected to a rotating casing 12, for working on flat surfaces, rotating cam means 131, 132, 133, connected to the abrasive oscillating blocks B through arms 14 integral with the tool supports 11.
  • a first motor 20 is adapted to move the rotating casing 12 by imparting a first dragging speed ⁇ t1.
  • a second motor 30 is adapted to move the rotating cam means 131, 132, 133 by imparting a second dragging speed ⁇ t2.
  • a controller of the first motor 20 and of the second motor 30 is adapted to allow to regulate the distribution of the value of the first dragging speed ⁇ t1 and that of the second dragging speed ⁇ t2 to allow to obtain the desired law of motion ⁇ B of the abrasive oscillating blocks B.
  • the rotating casing 12 is integral with a central flange 15, the central flange 15 being connected to a central flanged hollow shaft 21 moved by the first motor 20.
  • the rotating cam means 131, 132 are integral with a central pin 16, the central pin 16 being connected to a central shaft 31 moved by the second motor 30.
  • the rotating cam means 131 consists of an axial cam with an almost sinusoidal profile interacting with the arms 14.
  • the rotating cam means 132 consists of an inclined plate interacting with said arms 14.
  • the rotating cam means 133) are connected to a central pin 16 through an angular joint 17 and to a device of variation of the axial orientation 40.
  • the device for variation of the axial orientation 40 is moved by a controlled motor 50 through a gear reducer 41 to allow the axial orientation of the rotary cam means 133 to be changed of a value determined as a function of an angular rotation ß.
  • the central pin 16 is connected to a central shaft 31 moved by the second motor 30.
  • the rotating cam means 133 consists of a plate with variable inclination to allow adjustment of the amplitude of the angular excursion of the abrasive oscillating blocks B, independently of the desired law of motion ⁇ B of the abrasive oscillating blocks B.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Abstract

L'invention concerne une unité de meulage (100) comprenant une tête rotative (10) pourvue de blocs oscillants abrasifs (B) montés sur des supports d'outil (11) raccordés à un boîtier rotatif (12), pour travailler sur des surfaces plates, des moyens de came rotatifs (131), (132), (133), raccordés aux blocs oscillants abrasifs (B) par le biais de bras (14) solidaires des supports d'outil (11). Un premier moteur (20) est conçu pour déplacer le boîtier rotatif (12) en appliquant une première vitesse de traînage (ωt1). Un deuxième moteur (30) est conçu pour déplacer les moyens de came rotatifs (131), (132), (133) en appliquant une deuxième vitesse de traînage (ωt2). Un dispositif de commande du premier moteur (20) et du deuxième moteur (30) est conçu pour permettre de réguler la distribution de la valeur de la première vitesse de traînage (ωt1) et celle de la deuxième vitesse de traînage (ωt2) pour permettre d'obtenir une loi de déplacement souhaitée (ωB) des blocs oscillants abrasifs (B).
PCT/IT2019/050206 2018-09-25 2019-09-23 Unité de meulage WO2020065688A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19787479.5A EP3856457B1 (fr) 2018-09-25 2019-09-23 Unité de meulage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT201800008898 2018-09-25
IT102018000008898 2018-09-25

Publications (1)

Publication Number Publication Date
WO2020065688A1 true WO2020065688A1 (fr) 2020-04-02

Family

ID=64607169

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2019/050206 WO2020065688A1 (fr) 2018-09-25 2019-09-23 Unité de meulage

Country Status (2)

Country Link
EP (1) EP3856457B1 (fr)
WO (1) WO2020065688A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114934320A (zh) * 2022-05-20 2022-08-23 北京森海氧源科技有限公司 一种负离子石墨烯抗菌抑菌涤纶纤维设备与制备方法
GB2625297A (en) * 2022-12-13 2024-06-19 Hm Tech Ltd Sander

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE800112C (de) * 1949-07-15 1950-09-01 Karl Dipl-Ing Fickert Flaechenschleif- und Poliermaschine
IT1175191B (it) 1983-03-14 1987-07-01 Marcello Toncelli Testa rotante con mole a settori oscillanti, con meccanismo di comando a disco inclinato, per levigatura di marmi, graniti e pietre dure
DE3924772A1 (de) * 1988-07-27 1990-02-01 Gasperetti Consulenze Impianti Kopf mit schwingarmen zum schleifen von marmor, granit und aehnlichen materialien
US5145326A (en) 1989-06-16 1992-09-08 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Variable capacity wobble plate type compressor with capacity regulating valve
US5339569A (en) 1991-02-14 1994-08-23 Linden Machines B.V. Surface processing device
EP0687527A1 (fr) * 1994-06-15 1995-12-20 Daniel Bernat Tête de polissage à patins abrasifs oscillants pour le travail de surfacage de la pierre
DE4408560C2 (de) 1994-03-14 1996-08-22 Ralf Schankweiler Schleifkopf mit Schleifsegmenten zur Oberflächenbearbeitung von Natur- oder Kunststein
DE20108708U1 (de) * 2001-05-25 2001-07-26 Wasmer Paul Trockenschleifen

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE800112C (de) * 1949-07-15 1950-09-01 Karl Dipl-Ing Fickert Flaechenschleif- und Poliermaschine
IT1175191B (it) 1983-03-14 1987-07-01 Marcello Toncelli Testa rotante con mole a settori oscillanti, con meccanismo di comando a disco inclinato, per levigatura di marmi, graniti e pietre dure
DE3924772A1 (de) * 1988-07-27 1990-02-01 Gasperetti Consulenze Impianti Kopf mit schwingarmen zum schleifen von marmor, granit und aehnlichen materialien
US5145326A (en) 1989-06-16 1992-09-08 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Variable capacity wobble plate type compressor with capacity regulating valve
US5339569A (en) 1991-02-14 1994-08-23 Linden Machines B.V. Surface processing device
DE4408560C2 (de) 1994-03-14 1996-08-22 Ralf Schankweiler Schleifkopf mit Schleifsegmenten zur Oberflächenbearbeitung von Natur- oder Kunststein
EP0687527A1 (fr) * 1994-06-15 1995-12-20 Daniel Bernat Tête de polissage à patins abrasifs oscillants pour le travail de surfacage de la pierre
DE20108708U1 (de) * 2001-05-25 2001-07-26 Wasmer Paul Trockenschleifen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114934320A (zh) * 2022-05-20 2022-08-23 北京森海氧源科技有限公司 一种负离子石墨烯抗菌抑菌涤纶纤维设备与制备方法
GB2625297A (en) * 2022-12-13 2024-06-19 Hm Tech Ltd Sander

Also Published As

Publication number Publication date
EP3856457B1 (fr) 2022-10-26
EP3856457A1 (fr) 2021-08-04

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