EP0437831B1 - Polierkopf mit schwingenden Schleifsteinen zum Bearbeiten von Steinmaterialien, insbesondere von Granitplatten - Google Patents

Polierkopf mit schwingenden Schleifsteinen zum Bearbeiten von Steinmaterialien, insbesondere von Granitplatten Download PDF

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Publication number
EP0437831B1
EP0437831B1 EP90125427A EP90125427A EP0437831B1 EP 0437831 B1 EP0437831 B1 EP 0437831B1 EP 90125427 A EP90125427 A EP 90125427A EP 90125427 A EP90125427 A EP 90125427A EP 0437831 B1 EP0437831 B1 EP 0437831B1
Authority
EP
European Patent Office
Prior art keywords
attached
floating
grinders
collar
lapping 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.)
Expired - Lifetime
Application number
EP90125427A
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English (en)
French (fr)
Other versions
EP0437831A1 (de
Inventor
Walter Cado'
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.)
BREMA Srl
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BREMA Srl
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Filing date
Publication date
Application filed by BREMA Srl filed Critical BREMA Srl
Priority to AT90125427T priority Critical patent/ATE96717T1/de
Publication of EP0437831A1 publication Critical patent/EP0437831A1/de
Application granted granted Critical
Publication of EP0437831B1 publication Critical patent/EP0437831B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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 invention concerns a lapping bead with floating grinders for rocky materials, particularly suited to lap granite slabs. It is a known fact that the lapping of marble, granite and other rocky material slabs is done through lapping heads presenting some abrasive sections.
  • Said lapping heads consist of a main body having a cylindrical or polyhedral shape and supporting a plurality of grinders around its outer periphery. The head is made to rotate around its own vertical axis, so that the grinders around its periphery are also brought into rotation. At the same time each of the grinders is also made to float around a horizontal axis.
  • the lapping of the slab is, therefore, obtained by the abrasive action of the grinders, which combine the rotational motion around a vertical axis with the floating motion on a vertical plane of each one of them.
  • the rotational motion of the head and the floating motion of the grinders are obtained through a kinematic device consisting of a pinion gear engaging at the same time two cogged wheels, which are co-axial to each, one of them being attached to the main head body, while the other one is attached to a cam.
  • the pinion gear rotates, it causes the rotation of both cogged wheels, causing, therefore, both the rotation of the head main body and the rotation of the cam. While the latter is rotating, it contrasts against some levers which are connected with the grinder-supporting shafts and thereby causes the floating movements of the grinders.
  • the cam rotates with a speed which slightly differs from the speed of the main body of the lapping head. Therefore, the number of floating motions per minute of the grinders is noticeably lower than the number of r.p.m. of the head body. The number of said floating motions is, moreover, reduced in direct proportion to the relative speed between the two cogged wheels and, therefore, in direct proportion to the difference of their numbers of cogs.
  • a further inconvenience consists in that the presence of the floating levers activating the grinder-holding shafts extend tangentially and thereby reduce the number of grinders which can be mounted on each lapping head in relation to its diameter.
  • the lapping heads of the known type require an accurate setup when they are assembled, particularly concerning the positioning of the floating elements of the grinders in relation to the cam outline. In any case, regardless of the accuracy of both the cam outline and of the assembly, there will always be a small slack which tends to increase as time goes by.
  • the purpose of the present invention is to eliminate said inconveniences and its main purpose, in particular, is the disclosure of a lapping head with floating grinders, presenting a simpler and less costly construction than the laping heads of the known type.
  • Another purpose is to disclose a lapping head able to stand shocks and accidental dynamic loads without being damaged.
  • Another purpose is for the lapping head according to the invention not to require difficult adjustments or adaptations at the time of its assembly.
  • Another purpose of the invention is for the lapping head to operate reliably and to require as little maintenance as possible.
  • the lapping head of the invention to allow the assembly of a higher number of floating grinders than the lapping heads of the known type having the same peripheral dimensions.
  • the central eccentric collar is rigidly connected with the pinion gear through a pin connection and its outer diameter, which is eccentric in relation to the inner hole within which it is coupled with the vertical shaft, is slidingly keyed within a cylinder-shaped collar.
  • the cylinder-shaped collar is bound through pivots to planetary eccentric collars, preferably three in number, which are lodged within seats which are machined within the lower box.
  • the central eccentric collar and the planetary eccentric collars present the same degree of eccentricity, so that, while the central eccentric collar is rotating, the cylinder shaped collar to which it is keyed is forced to follow it and each part of its surface performs in relation to the lower box a plurality of revolutions having a radius corresponding to the value of eccentricity of the eccentric collars.
  • One or more pistons are arranged each within a radial slot obtained within the cylinder-shaped collar and they are connected with levers, which are connected in turn with the shafts supporting the grinders. Through the levers which are connected with the shafts supporting the grinders, said pistons transmit to the latter only the tangential component of the rotating motion of the cylinder-shaped collar, thereby making the floating motion of the grinders possible.
  • a very simple and inexpensive lapping head is obtained, which does not require complex adjustment and setup operations while it is being assembled.
  • the lapping head according to the invention does not require much maintenance when used, although it presents a high degree of reliability, a reduced rate of wear and tear and a high capability of absorbing dynamic loads and shocks.
  • the lapping head according to the invention which is indicated as a whole with 1, presents a body 20 containing all the kinematic elements and consisting of a lower box 22, on the top of which is attached through suitable means, for instance screws 25, an upper lid 21 presenting a central axial hole 23. Whithin hole 23 of the upper lid 21 is assembled an eccentric flange 3 which is not allowed to rotate, since it is attached by means of a pin 4 to a fork 5, which in turn is solidly attached to the base 24 of the lapping machine.
  • a ring gear with inner cogs 7 is attached to the inner face of the upper lid 21. Therefore, said ring gear is also attached to the lower box 22 and to the body 20 of the lapping head.
  • the pinion gear 6 which engages the inner cogs of the ring gear 7 is coupled by means of bearing with the outer part of the eccentric flange 3, while a vertical shaft 2 is coupled through bearings with the inside of the hole 31 of the same eccentric flange 3.
  • Said shaft is attached to the lower box 22 by means of suitabble connecting mechanical elements, for instance a nut 33 which is screwed on the thread 34 of its lower end.
  • a radial slot 8 is machined on the pinion gear 6.
  • a pivot 9 is bound within said slot and it is fixed within a seat 42 which is obtained within a central eccentric collar 10, which is slidingly keyed around the intermediate diameter 35 of the vertical shaft 2 preferably through the interposition of a bearing 36.
  • Pivot 9 allows pinion gear 6, while rotating, to bring the central eccentric collar 10 into rotation, too. Therefore collar 10 also has a rotating movement in relation to the intermediate diameter 35 of the shaft 2, which acts as its rotational pivot.
  • the central eccentric collar 10 in turn is keyed , preferably through a bearing 38, within the cylinder-shaped collar 11, which is bound to the lower box 22 by means of three pins 12, each of which is connected with its own planetary eccentric collars 13, lodged within suitable seats 36 machined within the lower box 22.
  • Said planetary eccentric collars 13, as can be observed more closely in Fig. 2, are arranged one in relation to the other preferably at an alpha angle measuring 120 degrees around the center of the rotational vertical shaft 2. It will, however, be specifically pointed out that this embodiment can be varied, in that the number of planetary eccentric collars 13 can be in a number differring from three.
  • the central eccentric 10 and the planetary eccentrics 13 present the same degree of eccentricity 14, so that the cylinder-shaped collar 11 is forced to follow the central eccentric collar 10 during its rotational movement and each of its points describes, therefore, a circular trajectory having a radius, the value of which equals the value of the eccentricity 14. Therefore, when the vertical shaft 2 is brought into rotation, it causes the rotation of the body 20 of the lapping head and of the ring gear 7, which is attached to it, of the pinion gear 6 engaging the ring gear 7, of the central eccentric collar 10 connected with the pinion gear 6 and of the cylinder-shaped collar 11, which is coupled with the central eccentric 10, all of these elements turning around one and the same vertical axis 36.
  • each point of the cylinder-shaped collar 11 describes, in relation to the lower box 22, a circumference having a radius equalling the degree of eccentricity 14 of the central eccentric collar 10 and of the planetary eccentric collars 13.
  • Some horizontal slots 15 having a radial arrangement are machined within the cylinder-shaped collar 11.
  • they are four in number and are arranged at an angle of 90 degrees from each other.
  • the embodiment can be varied, by matching the number of slots with the number of grinders 40 to be assembled, depending on the outer dimensions of the body 20 of the lapping head, as will be better explained hereafter.
  • each of the slots 15 lodges a cylinder piston 16 complete with a transversal hole 41, into which a lever 17 is inserted and attached to a shaft 18. It has been said that, while the central shaft 2 is rotating, each point of the cylinder-shaped collar 11 describes, in relation to the lower box 22, a circumference having a radius equalling the degree of eccentricity 14 of the eccentric collars 10 and 13. It is known that each circular motion can be broken out into the sum of two elementary motions, one of them being radial while the other one is tangential.
  • support 19 on which the grinder 40 is applied accomplishes a hunting motion in a vertical plane which is parallel to the vertical axis 36 around which body 20 and, therefore, the entire lapping head rotate.
  • the lapping head according to the invention can be provided around its periphery with any number of grinders 40 and, as a consequence, of shafts 18, depending on the outer diameter of the lapping head and on the bulk of the grinders. It has also been said that, at the discretion of the manufacturer, the number of the planetary eccentric collars 13 belonging to the lapping head can be varied, as can be varied the number of cogs of the pinion gear 6 and of the ring gear 7, so as to obtain the transmission ratio between the two which best suits the specific requirements.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Walking Sticks, Umbrellas, And Fans (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Claims (6)

  1. Honkopf mit schwimmend-gelagerten Schleifscheiben, der aus folgendem besteht:
    - ein Körper (20) bestehend aus einem unteren Gehäuse (22), das am oberen Ende durch einen damit verbundenen Deckel geschlossen ist, wobei der genannte Deckel eine axiale Bohrung (23) aufweist;
    - ein Zahnrad (7) mit Innenverzahnung, das an der inneren Oberfläche des oberen Deckels befestigt und mit seiner axialen Bohrung (23) koaxial angebracht ist;
    - eine an der Unterlage der Honmaschine (24) befestigte exzentrische Flansche (23), die eine axiale Bohrung (31) aufweist und innerhalb der axialen Bohrung (23) des oberen Deckels (21) frei aufgezogen ist;
    - eine senkrechte Welle (2), die mit einem Antrieb, der durch die Bohrung (31) der exzentrischen Flansche (31) durchgehet, gekuppelt ist, wobei der genannte Antrieb mit der genannten Flansche durch Lager (32) gekuppelt ist und die genannte Welle (2) ein Ende (34) aufweist, das am unteren Gehäuse (22) durch dazu geeignete Verbindungsmittel (33) befestigt ist;
    - ein Ritzel (6), das in das Zahnrad (7) mit inneren Verzahnung einschaltet und mit der exzentrischen Flansche (3) durch Lager (61) gekuppelt ist;
    - Eine Mehrzahl von am Rand des unteren Gehäuses (22) angeordneten Schleifscheiben (40), wobei jede Schleifscheibe an einem Halter (19) befestigt ist, der durch eine Welle (18) mit kinematischen Elementen gekuppelt ist, die Bewegung übertragen und im unteren Gehäuse (22) enthalten sind,
    dadurch gekennzeichnet, daß ein zentraler exzentrischer Bundring (10), der mit der senkrechten Welle (2) in deren zwischenliegenden Stellung gekuppelt ist und der durch dazu Geeignete Kupplungsmittel (8,9) mit dem Ritzel (6) gekuppelt ist, durch einen zylinderförmigen Ring (11) und durch einige mechanischen Kupplungselemente (8,9,16,17) mit den exzentrischen, mit dem unteren Gehäuse (22) gekuppelten Sonnenrädern (13), sowie mit jeder Welle (18), die mit dem die Schleifscheibe (40) haltenden Halter (19) gekuppelt sind, zusammenarbeitet, wobei die schwimmende Bewegung jeder Schleifscheibe (40) erfolgt, als die senkrechte Welle (2) dreht und den Körper (20) des Honkopfes, woran sie befestigt ist, antreibt.
  2. Honkopf mit schwimmend-gelagerten Schleifscheiben nach Anspruch 1, dadurch gekennzeichnet, daß ein Zapfen (9), der innerhalb eines im zentralen exzentrischen Bundring (10) ausgebohrten Schlitzes (42) befestigt und innerhalb eines radialen im Ritzel (6) ausgebohrten Schlitzes festgehalten ist, den zentralen exzentrischen Bundring (10) mit dem Ritzel (6) starr zusammenbindet.
  3. Honkopf mit schwimmend-gelagerten Schleifscheiben nach Anspruch 2, dadurch gekennzeichnet, daß der im zentralen exzentrischen Bundring (10) befestigte Zapfen (9) gegen den radialen Schlitz (8) des Ritzels (6), worin er durch Kontakt-Oberflächen (51) gekuppelt ist, widersteht.
  4. Honkopf mit schwimmend-gelagerten Schleifscheiben nach Anspruch 1, dadurch gekennzeichnet, daß der Bundring (10) innerhalb des zylinderförmigen Ring (11) gleitend aufgezogen ist.
  5. Honkopf mit schwimmend-gelagerten Schleifscheiben nach Anspruch 1, dadurch gekennzeichnet, daß der Exzentrizitätsgrad des zentralen exzentrischen Bundrings (10) gleich dem Exzentrizitätsgrad jedes exzentrischen Sonnerads (13) ist.
  6. Honkopf mit schwimmend-gelagerten Schleifscheiben nach Anspruch 1, dadurch gekennzeichnet, daß die Verbindung zwischen dem zylinderförmigen Ring (11) und jeder mit dem jede Schleifscheibe (40) haltenden Halter (19) verbundenen Welle (18) durch einen Kolben (16) erfolgt, der innerhalb des im zylinderförmigen Ring (11) ausgebohrten radialen Schlitzes (15) erhalten wird, wobei der genannte Kolben mit einem Hebel (17) verbunden ist, der an der Welle (18) jedes Halters (19), der jede Schleifscheibe (40) hält, befestigt ist.
EP90125427A 1990-01-18 1990-12-24 Polierkopf mit schwingenden Schleifsteinen zum Bearbeiten von Steinmaterialien, insbesondere von Granitplatten Expired - Lifetime EP0437831B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90125427T ATE96717T1 (de) 1990-01-18 1990-12-24 Polierkopf mit schwingenden schleifsteinen zum bearbeiten von steinmaterialien, insbesondere von granitplatten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8550490 1990-01-18
IT85504A IT1240859B (it) 1990-01-18 1990-01-18 Testa levigatrice a mole oscillanti per materiali lapidei, particolarmente granito in lastre

Publications (2)

Publication Number Publication Date
EP0437831A1 EP0437831A1 (de) 1991-07-24
EP0437831B1 true EP0437831B1 (de) 1993-11-03

Family

ID=11327145

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90125427A Expired - Lifetime EP0437831B1 (de) 1990-01-18 1990-12-24 Polierkopf mit schwingenden Schleifsteinen zum Bearbeiten von Steinmaterialien, insbesondere von Granitplatten

Country Status (5)

Country Link
EP (1) EP0437831B1 (de)
AT (1) ATE96717T1 (de)
DE (1) DE69004411T2 (de)
ES (1) ES2046665T3 (de)
IT (1) IT1240859B (de)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1258733B (it) * 1992-05-22 1996-02-27 Testa per macchina lucidatrice con portasettori oscillanti
IT1262522B (it) * 1993-05-25 1996-07-02 Comes Srl Testa per macchina lucidatrice con portasettori oscillanti.
IT1270758B (it) * 1993-12-07 1997-05-07 Brema Srl Testa levigatrice perfezionata per materiale lapidei, particolarmente per granito in lastre
IT1278641B1 (it) * 1995-04-14 1997-11-27 Comes Srl Testa perfezionata per macchine lucidatrici con bracci portasettori oscillanti
IT1292726B1 (it) * 1997-05-14 1999-02-11 Luigi Pedrini Testa di lucidatura per materiali lapidei in granito, pietre dure o materiale ceramico, dotata di moto tangenziale oscillante continuo dei
IT1297515B1 (it) * 1997-12-04 1999-12-17 Synergy Sarda Snc Testa tangenziale per la levigatura e la lucidatura del granito e del gres porcellanato
IT1391076B1 (it) * 2008-07-11 2011-11-18 Comes Srl Testa per il trattamento di materiali lapidei o ceramici
WO2010106389A1 (en) * 2009-03-18 2010-09-23 Co.Me.S. S.R.L. Head for the treatment of stone and ceramic materials
CN102528658B (zh) * 2012-01-19 2015-12-09 佛山市豪伟德机械有限公司 一种带自转和公转的砂架装置
DE102012105610B4 (de) 2012-06-27 2014-11-06 Technische Universität Kaiserslautern Körperschaft des öffentlichen Rechts Vorrichtung zum Schleifen oder Polieren
CN108247518B (zh) * 2018-03-28 2020-08-07 广东科达洁能股份有限公司 一种偏心平动式抛光磨头及包括该磨头的抛光机
CN108943022B (zh) * 2018-08-09 2024-06-25 张欢 一种径向柔顺补偿装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE680641C (de) * 1936-04-10 1939-09-02 Marbriere De Paris Sa Soc Flaechenschleif- und Poliervorrichtung fuer harte Werkstoffe verschiedener Haerte, insbesondere fuer Gestein
IT1132464B (it) * 1980-08-25 1986-07-02 Ermanno Pacini Utensile per la sgrossatura,levigatura e lucidatura di superfici solide,particolarmente adatto per materiali lapidei
DE8808679U1 (de) * 1988-07-06 1988-11-17 Wallin, Anders, Lund Schleifkopf zum Oberflächenbearbeiten und Polieren von Stein, Marmor und anderen harten Werkstoffen

Also Published As

Publication number Publication date
IT9085504A0 (it) 1990-01-18
ATE96717T1 (de) 1993-11-15
DE69004411T2 (de) 1994-06-01
IT1240859B (it) 1993-12-17
EP0437831A1 (de) 1991-07-24
IT9085504A1 (it) 1991-07-19
ES2046665T3 (es) 1994-02-01
DE69004411D1 (de) 1993-12-09

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