EP0510603B1 - Schleifkopf, insbesondere zum Schleifen von Marmor, Granit und Gestein im allgemeinen - Google Patents

Schleifkopf, insbesondere zum Schleifen von Marmor, Granit und Gestein im allgemeinen Download PDF

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Publication number
EP0510603B1
EP0510603B1 EP92106867A EP92106867A EP0510603B1 EP 0510603 B1 EP0510603 B1 EP 0510603B1 EP 92106867 A EP92106867 A EP 92106867A EP 92106867 A EP92106867 A EP 92106867A EP 0510603 B1 EP0510603 B1 EP 0510603B1
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EP
European Patent Office
Prior art keywords
grinder
shaft
grinder head
tool
teeth
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.)
Expired - Lifetime
Application number
EP92106867A
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English (en)
French (fr)
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EP0510603A2 (de
EP0510603A3 (en
Inventor
Stangherlin Ampelio
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SIMEC SpA
Original Assignee
SIMEC SpA
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Publication date
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Application filed by SIMEC SpA filed Critical SIMEC SpA
Publication of EP0510603A2 publication Critical patent/EP0510603A2/de
Publication of EP0510603A3 publication Critical patent/EP0510603A3/en
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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 grinder head, particularly for polishing marble, granite and stone materials in general.
  • Grinder machines for polishing marble are therefore provided with a grinder head having a plurality of radial grinder tools.
  • the grinder head rotates about a vertical axis while the grinder tools are oscillating about their horizontal axis.
  • Each grinder tool generally has a curved working surface and therefore the tool working surface is substantially reduced to a constantly changing line.
  • Grinder heads of this type have a very expensive construction due to the complicated lever mechanisms required for rotating the head and at the same time oscillating the grinder tools on the head.
  • the aim of the present invention is to provide a rotating grinder head overcoming the above mentioned disadvantages and wherein the grinder tools are oscillating by means of far simpler and reliable mechanisms than those of the prior art.
  • a grinder head particularly for polishing marble, granite and stone materials in general, having all the features defined in the attached claim 1.
  • the grinder head comprises a plurality of grinder tools 3 arranged radially on a case 5.
  • Each grinder tool 3 has a shaft 7 having a gearwheel 9.
  • Each gearwheel 9 is connected to two adjacent gearwheels of adjacent shafts so that all the shafts 7 oscillate together.
  • At least one arm 11 is connected to one of shafts 7 and supports at least one wheel 13. Wheel 13 rolls along the undulated profile of a cam 15, which rotates in the same direction of the case 5 although at a different speed.
  • FIGS. 2 and 3 show one of gearwheels 9 in greater detail.
  • the different rotation speed of the cam 15, with respect to the case 5, causes the oscillation of the arm 11, rigidly associated with the shaft 7, and thus the partial and alternating rotation of the shaft itself.
  • the grinding member is caused to oscillate because it is rigidly associated with the shaft, which is in turn connected to the wheel 13 which follows the shape of the cam.
  • the grinder tools oscillate with an undulatory motion, each one in the direction opposite to the adjacent grinder tools.
  • the oscillation of the grinder tools makes the grinding member to work with a cutting line which changes continuously, thus making it wear uniformly so as to obtain better polishing and excellent efficiency of said tool.
  • FIGS. 4-7 show a grinder head 101 according to a further aspect of the invention, wherein a plate 120 is rigidly associated with the mandrel of the grinder machine.
  • a bearing 102 is arranged between the central shaft 104, which rotates, and the upper part 106 of the case, which is fixed to the machine.
  • the secondary shafts 103 are fixed on the upper part 106 of the case and constitute the shafts of gearwheels 105; the gearwheels 105 are actuated by the gearwheel 107 which is rigidly associated with the mandrel. Therefore, the gearwheel 107, by means of the gearwheels 105, transmits motion to the gearwheel 108 as well.
  • the movable case 112 is connected to the lower slotted part of the main shaft by means of two concentric metallic rings 113 and 114 which are joined by a layer of rubber 115 and define an elastic rubber coupling.
  • the planetary gearwheels 105 are divided into two parts having a different number of teeth.
  • Figure 5 is a cutout view of the grinder head showing the lower case 112 which supports the grinding wheels 119.
  • the undulatory motion of the slotted shafts 118 is transmitted to the grinder tools, and the slotted shafts are provided with two arms 117 which have, at their ends, wheels 116 which follow the profile 111a of the cam 111.
  • FIG. 6 is a detail view of a grinder tool 119 which oscillates about the axis of the slotted shaft 118.
  • the slotted shaft 118 has two arms 117 at whose ends two wheels 116 are arranged and follow the profile 111a of the cam 111.
  • the slotted shafts are parallel to the working plane and are provided with two arms, at each end of which there is a wheel which is adapted to follow the profile of the internal cam.
  • Rotary motion is transmitted to all the elements of the machine by the central shaft which is connected to the motor of the polishing machine and by adapted gearwheels.
  • the shaft transmits its motion directly to the lower case which supports the grinding wheels and, by means of gearwheels, to the internal cam as well.
  • the gearwheels rotate the cam with a speed which is different from the rotation speed of the shaft, because there is a small difference in the number of their teeth.
  • the oscillation is produced by the profile of the cam, which forces a continuous lowering of an arm, causing the rise of the opposite arm.
  • the central shaft meshes with a ring which is joined to a second outermost ring by means of the rubber coupling.
  • the rubber coupling in addition to transmitting motion, has three other functions: damping start up; compensating slight differences in the level of the working surface; absorbing vibrations during operation.
  • This coupling avoids the presence of any metallic connection between the motor shaft and the movable part.
  • a ring is screwed on the lower end of the motor shaft, which is threaded, and supports all the movable parts of the head.
  • FIGS 7-9 show a detail of the grinder tool of the grinder head according to the invention.
  • Two or more guides with converging sides, suitable for supporting the tools, are defined on the tool holder, which is fixed to the arms of the rotating head.
  • Said converging guides are arranged on different planes and are defined by sectional portions of the same cone; therefore they are arranged above one another and are shifted with respect to one another so that if their converging sides are ideally extended the meeting points do not coincide on a horizontal plane but are slightly offset.
  • the abrasive-carrying tool which is inserted on these guides is also obtained from the same cone, and therefore can be inserted in any guide, arranging itself at different distances from the rotation axis.
  • the tool is provided with an elongated central body with overlying protrusions which allows its insertion up to the innermost guide.
  • the length of the tool is chosen so as to ensure perfect coupling in any position.
  • the abrasive-carrying tool can thus be arranged in various positions and thus at various distances from the rotation axis of the head, defining, on the working surface, different annuli which are larger or smaller than the crown defined by the normal coupling. It is thus possible to perform, with the same tool, machining with different diameters depending on the guide in which said tool has been inserted.
  • the working diameter is chosen according to the type, hardness and size of the material to be machined.
  • the tool coupling for oscillating and non-oscillating rotating heads for machining ceramic, glassy and stone-like materials is provided with a plurality of guides in which the tool is inserted; said guides are mutually superimposed and shifted forward or backward with respect to one another so that the tool is inserted in a different position with respect to the center of rotation of the head.
  • Figure 7 shows the three cones 201, 202 and 203 which are mutually offset and at different levels; the three guides 204, 205 and 206 are obtained from their profiles and are arranged at different levels on the same tool holder 207.
  • Figure 8 is a view of the grinder tool 208, which is composed of an abrasive part 209 and of an upper abrasive-carrying part 210 which is suitable for being inserted on the holder 207 which is fixed to the arm 212 of the rotating head (indicated in broken lines).
  • the upper part 210 is provided with a central body and with two protrusions 211 which are suitable for being inserted in the guides 204, 205 and 206.
  • Figure 9 shows the various positions in which the tool 208 can work by inserting it in the various guides 204, 205 and 206; in the first position, the tool 208 is arranged on the innermost guide 204 and defines the smallest crown 213; in the second position, the tool 208 is inserted on the intermediate guide 205 and the crown 214 defined by the tool is the intermediate one; in the third position, the tool 208 is arranged on the lowermost guide 206 and defines the largest crown 215.
  • the materials employed, as well as the dimensions, may be any according to the specific needs and the state of the art.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Claims (4)

  1. Schleifkopf, insbesondere zum Schleifen von Marmor, Granit und Gestein im allgemeinen, mit einem drehbaren Gehäuse (5) zur Ankopplung an eine vertikale Spindel einer Schleifmaschine, das eine Vielzahl von radialen Schleifwerkzeugen (3) trägt, die jeweils auf einer Welle (7) befestigt sind, wobei wenigstens eine dieser Wellen starr mit wenigstens einem Arm (11) verbunden ist, der Arm einen Mitnehmernocken (13) trägt, der mit einer Steuerkurve (15) zusammenwirkt, um die Welle hin und her zu bewegen, dadurch gekennzeichnet, daß er Verbindungsmittel enthält, die geeignet sing, jede Welle mit wenigstens einer benachbarten Welle zu verbinden, wobei diese Verbindungsmittel ein Getriebeglied (9) enthalten, das eine zentrale, auf jede Welle nahe ihrem inneren Ende aufgesetzte Nabe und ein Paar von seitlichen Vorsprüngen besitzt, die sich von diametral gegenüberliegenden Seiten der Nabe aus, erstrecken, wobei jeder Vorsprung an seinem äußeren Ende einen Satz von Zähnen besitzt, der so angepaßt ist, daß er kontinuierlich in einen entsprechenden Satz von Zähnen eingreift, der zu einem benachbarten Getriebeglied gehört, wobei die Verbindung dergestalt ist, daß die Schneidlinien der Schleifwerkzeuge sich kontinuierlich verändern und dadurch einen gleichmäßigen Werkzeugverschleiß bedingen.
  2. Schleifkopf gemäß Anspruch 1, dadurch gekennzeichnet, daß die Zähne der mit Zähnen versehenen Vorsprünge konisch sind.
  3. Schleifkopf gemäß Anspruch 1, dadurch gekennzeichnet, daß jede Welle (118) zwei symmetrische Arme (117) besitzt, wobei beide mit einem Mitnehmer (116) versehen sind, der mit der Steuerkurve (111) zusammenwirkt.
  4. Schleifkopf gemäß Anspruch 1, dadurch gekennzeichnet, daß das Gehäuse (5) mit der vertikalen Spindel durch eine elastische Kupplung verbunden ist, die durch zwei konzentrische, durch eine Gummischicht (115) verbundene Metallringe (113,114) gebildet ist.
EP92106867A 1991-04-23 1992-04-22 Schleifkopf, insbesondere zum Schleifen von Marmor, Granit und Gestein im allgemeinen Expired - Lifetime EP0510603B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPD910078 1991-04-23
ITPD910078A IT1247256B (it) 1991-04-23 1991-04-23 Testa per la lucidatura di marmo, granito e materiali lapidei in genere con mole oscillanti.

Publications (3)

Publication Number Publication Date
EP0510603A2 EP0510603A2 (de) 1992-10-28
EP0510603A3 EP0510603A3 (en) 1993-01-13
EP0510603B1 true EP0510603B1 (de) 1996-01-10

Family

ID=11389550

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92106867A Expired - Lifetime EP0510603B1 (de) 1991-04-23 1992-04-22 Schleifkopf, insbesondere zum Schleifen von Marmor, Granit und Gestein im allgemeinen

Country Status (3)

Country Link
EP (1) EP0510603B1 (de)
DE (1) DE69207469D1 (de)
IT (1) IT1247256B (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1262522B (it) * 1993-05-25 1996-07-02 Comes Srl Testa per macchina lucidatrice con portasettori oscillanti.
IT1263400B (it) * 1993-09-22 1996-08-05 Luca Toncelli Perfezionamenti a testa levigatrice e lucidatrice per graniti e pietresimili
IT1267682B1 (it) * 1994-02-09 1997-02-07 Simec Spa Testa di lucidatura, particolarmente per lastre di marmo, granito, gres porcellanato ed altri materiali lapidei
IT1293124B1 (it) * 1997-06-18 1999-02-11 Giani & Grazzi Meccanica S R L Testa levigatrice e lucidatrice per lastre lapidee
ITMI20040311U1 (it) * 2004-06-24 2004-09-24 Dario Toncelli Testa di le igatura per materiali lapidei duri
IT202200013069A1 (it) * 2022-06-21 2023-12-21 Comes Srl Testa lucidatrice

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2015385C3 (de) * 1970-04-01 1973-12-06 Fickert & Winterling Kg Maschinenu. Schleifscheibenfabrik, 8590 Marktredwitz Schleifkopf, insbesondere zum Schleifen von ebenen Flachen an Werk stucken aus Stein, Glas oder ahnlichen Werkstoffen
IT1224987B (it) * 1988-07-27 1990-10-30 C I G Consulenze Impianti Gasp Testa a bracci oscillanti per la levigatura di marmi, graniti e simili

Also Published As

Publication number Publication date
EP0510603A2 (de) 1992-10-28
ITPD910078A1 (it) 1992-10-23
IT1247256B (it) 1994-12-12
DE69207469D1 (de) 1996-02-22
EP0510603A3 (en) 1993-01-13
ITPD910078A0 (it) 1991-04-23

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