EP1536916A2 - Broche equilibree de maniere inherente pour des tetes d'outil utilisees pour le calibrage, le lissage ou le polissage de dalles en pierre naturelle et/ou de carreaux de ceramique - Google Patents

Broche equilibree de maniere inherente pour des tetes d'outil utilisees pour le calibrage, le lissage ou le polissage de dalles en pierre naturelle et/ou de carreaux de ceramique

Info

Publication number
EP1536916A2
EP1536916A2 EP03727953A EP03727953A EP1536916A2 EP 1536916 A2 EP1536916 A2 EP 1536916A2 EP 03727953 A EP03727953 A EP 03727953A EP 03727953 A EP03727953 A EP 03727953A EP 1536916 A2 EP1536916 A2 EP 1536916A2
Authority
EP
European Patent Office
Prior art keywords
spindle
shaft
tubular housing
motor
tool 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.)
Granted
Application number
EP03727953A
Other languages
German (de)
English (en)
Other versions
EP1536916B1 (fr
Inventor
Luigi Pedrini
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1536916A2 publication Critical patent/EP1536916A2/fr
Application granted granted Critical
Publication of EP1536916B1 publication Critical patent/EP1536916B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B24B41/005—Feeding or manipulating devices specially adapted to grinding machines
    • 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
    • B24B27/0084—Other grinding machines or devices the grinding wheel support being angularly adjustable
    • 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
    • B24B41/042—Balancing mechanisms
    • 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
    • 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
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/20—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground
    • B24B7/22—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding inorganic material, e.g. stone, ceramics, porcelain

Definitions

  • the invention relates to an inherently balanced spindle for tool heads used in calibrating, smoothing or polishing natural stone slabs and/or ceramic tiles - i.e. a spindle which is operated over a work surface to rotate such heads about a normal axis to the work surface of slabs, granite tiles, hard stone, marble, or hard-fired porcelain tiles - which exhibits improved balanced operation and tool setting features.
  • spindles adapted to hold a variety of rotary tool heads with their pivot axis normal to a work surface.
  • the spindle is rotated through a belt drive, which means that an electric motor must be mounted with its centerline parallel to the rotation axis of the spindle.
  • the center of gravity of the assembly comprised of the spindle, motor and rotary head, operated for rotational and feed movements relative to the work surface, has to be placed far from the spindle axis. This results in the assembly becoming susceptible to vibrations transmitted by abrasive tools to said head and finally supported by the supporting structure to which said spindle is fixed.
  • a second problem occurs in known prior art spindles when mounting the spindle on said supporting structure.
  • Said structure is made of conveniently bent and welded 5 sheet and it has said spindle lock slot to be fitted with the correct position required by the material working; it is thus necessary to correctly position said spindle on said supporting structure and it is known in the art to side- shim the locking flange of said spindle tubular pan
  • the spindle mass is offset from the line of action of the cylinder actuator. Also in the prior art, the mass of the electric motor is unrelated to the feed motion of the spindle to/from the work surface and the spindle shaft is
  • the underlying technical problem of this invention is to provide a spindle assembly for abrasive machining, wherein the spindle, motor and tool head combination is inherently balanced and the spindle/tool head axis can be readily set relative to the work surface in a reliable manner .
  • a spindle for tool heads used in calibrating, smoothing or polishing natural stone slabs and/or ceramic tiles which spindle comprises: a tubular housing in which the spindle body is movable, the spindle body including a shaft carrying a rotary abrasive tool head at one end; a cylinder actuator for setting the position of the spindle and its associated tool head on the metal support structure; an electric motor for rotating the spindle; and a drive connecting said motor to the spindle shaft; characterized in that said motor and drive combination is replaced by two or more motors drivingly connected to the spindle shaft by means of gearing arranged to spread their mass and the drive torque evenly, as well as to allow the coolant supply line to the head tooling through the hollow interior of the spindle shaft, using standard electric motors .
  • the electric motors rate equally as- to power and torque, have their centerlines arranged symmetrically, and have respective pinion gears in mesh engagement ( with the gear wheel keyed to the spindle shaft.
  • the body of the spindle is coaxial with said cylinder actuator and connected rigidly to the piston rod of the cylinder.
  • the spindle body is bored and holds the spindle shaft rotatively, said spindle body forming the piston rod of said spindle- setting cylinder actuator.
  • the bottom chamber of said cylinder actuator has a larger working area than the top chamber overlying the cylinder piston.
  • said tubular housing can be swung around a spherical surface supporting the end flange, the other end having a spherical guide band for guiding the latter end across a mating cylindrical surface, and includes a clamping arrangement for locking the tubular housing and the spindle in a set position.
  • the clamping arrangement comprises screws which are passed through clearance holes in said flange and engage in wide washers, the clamping arrangement further comprising elastic fasteners for the flange added to the opposite end of the tubular housing.
  • the advantages of this invention are: the masses involved in the spindle holding abrasive tool heads are balanced such that the spindle center of gravity lies on the axis of the spindle itself and the overall mass is adequate to dampen vibration. This results in lessened transfer of vibration from the tooling to the spindle shaft, the vibration being more easily taken up by the metal supporting structure because unamplified by any offset mass.
  • the aligned cylinder actuator by having its piston rod coincident with the spindle body, allows a more compact design, more reliable construction, more convenient servicing, and does away with outward projecting lugs from the snindle bodv.
  • the increased mass of the spindle, head, reduction gear, and electric motors effectively increases the inertia of the spindle assembly for greatly improved self-dressing of the abrasive tools .
  • the thrust from the cylinder is counterbalanced, directed along the spindle axis, and adequate to take said mass of the spindle assembly and withstand the pressure on the material by virtue of the differential cylinder design and the controlled air pressur .
  • tubular housing for holding the spindle securely on the metal support structure allows, through the upper spherical support and the spherical guide at the other end, the directional setting of the abrasive tool head to be achieved readily and precisely, thereby to accommodate errors or inaccuracies of the metal structure advantageously -constructed by welding.
  • Figure 1 is a schematic axial section view of the inventive spindle driven off standard electric motors and having its shaft bored to allow the water supply line therethrough;
  • Figure 2 is a schematic sectional view of the coupling of said motors to the spindle shaft;
  • Figure 3 is a schematic sectional view of the cylinder actuator incorporated to the spindle body;
  • Figure 4 is a schematic sectional view of the spindle-holding tubular housing as assembled to the supporting structure.
  • Shown at 1 in Figure 1 is the spindle carrying the abrasive tool head, not shown, and at 2 the metal structure of the machine tool for calibrating, smoothing and polishing slabs of granite, hard stone, marble, or possibly hard-fired porcelain tiles.
  • the spindle is attached to the structure 2 through the swinging tubular housing 3 provided with a spherical ring 4 that bears through a flange 5 on an added ring 6, also spherical in shape, which is attached to said metal supporting structure 2 of the machine tool .
  • the flange 5 is secured by screws 7, and the other end of the tubular housing 3 is guided by the spherical band 8 of the tubular housing being in contact with the cylindrical seat 9 of the metal supporting structure 2.
  • the tubular housing 3, and with it the spindle 1 is further secured by the elastic fastening arrangement 10 acting on the added flange 11 at the latter end of the tubular housing.
  • Figure 1 also shows that the body 12 of the spindle 1 can slide along its axis and is provided with a piston 13 movable inside the cylinder liner 14, having at one end an integral cap 15 and at the other end the added cap 16 that acts as a tubular slideway for said body.
  • the flange 17 is clamped onto said body 12 to cover said tubular slideway of said added cap 16 with a tube 18.
  • a tongue 19 intervening between said tubular slideway and the tube 18 allows mutual sliding movement and inhibits rotation.
  • Fast with the flange 17 is the body of the reduction gearbox 20 that carries the electric motors 21, the latter being attached to the cover 22 of the reduction gearbox by means of set rings 23.
  • the electric motors are provided each with a pinion gear 24 that is keyed to their shaft to mesh with the center wheel 25, itself keyed to the hub 26 of the bored shaft 27.
  • FIG. 1 shown in Figure 1 is a drilled sleeve 28 set coaxially with the shaft 27 to allow a water supply line 29 therethrough that leads to the abrasive tool head.
  • the drilled shaft is rigid with the face joint 30 to the shaft of the spindle 31, also drilled through, at the opposite end whereof said abrasive tool head, not shown, is mounted.
  • the head is conventionally mounted detachably on the end flange 32 of the shaft of the spindle 31 for rotation therewith.
  • the reaction pin abuts the detent 33 that is rigid with the spindle body 12 for axial sliding movement therewith, so as to transmit the necessary torque to said head.
  • Figure 3 shows the seals 34 for the end caps 15 and 16 of the cylinder actuator 35 in which the piston 13 is slidable, the piston being provided with a seal 36.
  • the cylinder 35 is supplied a working fluid, advantageously air, in either direction through a line 37 in communication with the bottom chamber 38 having a larger working area, and through a line 39 communicated to the top chamber 40 having a smaller working area.
  • the working area differential is obtained by reducing the diameter of the body 12 in the bottom chamber 38, with regards to the diameter of said body in top chamber 40.
  • the screws 7 used for securing the flange 5 of the " tubular housing 3 are passed through clearance holes to thread into wide washers 41; the clearance in the holes being ample to allow the fasteners to be tightened even when a substantial tilt angle exists between the metal structure 2 and the tubular housing 3.
  • Figure 4 shows the slant setting 42 afforded for the tubular housing 3, and hence the spindle 1 with the tool head, relative to the metal supporting structure
  • the spindle assembly 1 is mounted on the metal supporting structure 2 by inserting the tubular housing 3 into the structure 2 and, after a precise setting is achieved, tightening the screws 7.
  • the screws are tightened to secure the tubular housing in a possibly slanted position 42 by swinging movement about the ball joint 4 between the flange 5 of the tubular housing and the ring 6 affixed to the structure 2.
  • the spherical band 8 allows the tubular housing to be set at said position 42 without losing contact with the cylindrical surface of the seat 9 to which it is attached. This end connection is enhanced by the elastic fasteners 10 acting on the tubular housing 3 through the added flange 11 to which it is rigidly connected.
  • the spindle is driven through the center gear wheel 25, which is keyed to the hub 26 of the hollow shaft 27.
  • the electric motors 21 are standard motors, since the coolant supply line 29 to the tooling is not passed through the motors 21.
  • the mass distribution is inherently balanced by having two or more motors 21 placed at equal intervals around the position circumference of the pinion gears 24 keyed to the respective motor shaft.
  • the cylinder actuator 35 is operated to feed the rotary head toward the slab workpiece by supplying the pressurized fluid, advantageously air, into one of the chambers on either side of the piston 13.
  • a small pressure in the bottom chamber 38 of larger area will raise the spindle assembly to a "floating" position, accommodating the substantial mass of the assembly of the spindle 1 over the work material.
  • a controlled pressure in the top chamber 40 will urge the rotary tool head toward and against the surface of the material being processed, thereby adjusting the working pressure exerted on the material for the desired value.
  • the cylinder actuator 35 is positioned under a high pressure, and the working depth is set externally by means of a conventional micrometric adjuster, not shown. The cylinder actuator 35, when held in the position shown under said pressure, allows the tool to be quickly moved away from the work material as the calibrating process is discontinued .

Abstract

L'invention concerne une broche comprenant un boîtier tubulaire (3) dans lequel le corps de broche peut se déplacer. Le corps de broche comprend un arbre (31) portant une tête d'outil abrasive et rotative, et un cylindre permettant de régler la position de la broche sur la structure métallique (2); un moteur électrique et un entraînement reliant ledit moteur à l'arbre de broche. Dans cette broche, au lieu d'un assemblage moteur/entraînement, deux ou plusieurs moteurs (21) sont reliés de manière entraînée à l'arbre de broche, au moyen d'un engrenage (24, 25) pour une répartition uniforme du poids et du couple d'entraînement, et pour permettre à la conduite d'alimentation (29) de liquide de refroidissement de passer par l'intérieur creux de l'arbre de broche (27, 31). Le corps de broche (12) est coaxial à l'actionneur de cylindre (35) et est rigidement relié à la tige de piston de cet actionneur; le boîtier tubulaire (3) peut contourner une surface sphérique (4) servant de support au rebord d'extrémité (5), l'autre extrémité présentant une bande de guide sphérique (8) permettant de guider cette dernière extrémité pour traverser une surface cylindrique d'accouplement (9); et un agencement de serrage (7, 10) permettant de verrouiller le boîtier tubulaire (3) et la broche complète (1) dans une position définie.
EP03727953A 2002-05-20 2003-05-15 Broche equilibree de maniere inherente pour des tetes d'outil utilisees pour le calibrage, le lissage ou le polissage de dalles en pierre naturelle et/ou de carreaux de ceramique Expired - Lifetime EP1536916B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT2002MO000135A ITMO20020135A1 (it) 2002-05-20 2002-05-20 Mandrino intrinsecamente equilibrato portante teste di calibratura, levigatura o lucidatura di materiali lapidei naturali e piastrelle ceram
ITMO20020135 2002-05-20
PCT/IT2003/000291 WO2003097297A2 (fr) 2002-05-20 2003-05-15 Broche equilibree de maniere inherente pour des tetes d'outil utilisees pour le calibrage, le lissage ou le polissage de dalles en pierre naturelle et/ou de carreaux de ceramique

Publications (2)

Publication Number Publication Date
EP1536916A2 true EP1536916A2 (fr) 2005-06-08
EP1536916B1 EP1536916B1 (fr) 2006-09-06

Family

ID=11451048

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03727953A Expired - Lifetime EP1536916B1 (fr) 2002-05-20 2003-05-15 Broche equilibree de maniere inherente pour des tetes d'outil utilisees pour le calibrage, le lissage ou le polissage de dalles en pierre naturelle et/ou de carreaux de ceramique

Country Status (8)

Country Link
EP (1) EP1536916B1 (fr)
AT (1) ATE338609T1 (fr)
BR (1) BR0304833B1 (fr)
DE (1) DE60308198T2 (fr)
ES (1) ES2272992T3 (fr)
IT (1) ITMO20020135A1 (fr)
PT (1) PT1536916E (fr)
WO (1) WO2003097297A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015124990A1 (fr) 2014-02-18 2015-08-27 Pedrini Spa Ad Unico Socio Mandrin amélioré pour le calibrage, le lissage ou le polissage de matériaux pierreux au moyen de têtes abrasives tournantes
WO2020065689A1 (fr) 2018-09-24 2020-04-02 Giovanni Tupini Tête d'actionnement dotée d'électro-broches
WO2020065687A1 (fr) 2018-09-24 2020-04-02 Giovanni Tupini Tête d'opération multibroche

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202000009079A1 (it) 2020-04-27 2021-10-27 Pedrini Spa Ad Unico Socio Mandrino perfezionato per teste rotanti di calibratura o levigatura di materiali planari artificiali o naturali

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1652055B2 (de) * 1967-07-20 1973-02-22 Hahn & KoIb, 7000 Stuttgart Flachlaeppmaschine
US4018012A (en) * 1973-10-11 1977-04-19 Mwa Company Method of grinding metal billets, blooms or slabs
JPS608179B2 (ja) * 1982-01-18 1985-03-01 日清工業株式会社 両頭平面研削盤
FR2537044A1 (fr) * 1982-08-16 1984-06-08 Manzini Marc Machine pour tailler une surface plane dans des blocs de pierre
JPS6254667A (ja) * 1985-09-02 1987-03-10 Nippei Toyama Corp 研削盤の砥石主軸台
GB2186823B (en) * 1986-02-06 1990-08-08 Nissei Ind Double-end surface grinding machine
JPH07100285B2 (ja) * 1990-10-23 1995-11-01 協同組合新素材加工研究会 平面研削装置
US6336849B1 (en) * 1998-02-04 2002-01-08 Koennemann Ronny Grinding spindle
IT1307496B1 (it) * 1999-09-10 2001-11-06 Zonato S P A Dispositivo di lucidatura a distribuzione migliorata del fluidorefrigerante, particolarmente per marmo, granito, ceramica, gres, gres

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03097297A3 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015124990A1 (fr) 2014-02-18 2015-08-27 Pedrini Spa Ad Unico Socio Mandrin amélioré pour le calibrage, le lissage ou le polissage de matériaux pierreux au moyen de têtes abrasives tournantes
WO2020065689A1 (fr) 2018-09-24 2020-04-02 Giovanni Tupini Tête d'actionnement dotée d'électro-broches
WO2020065687A1 (fr) 2018-09-24 2020-04-02 Giovanni Tupini Tête d'opération multibroche

Also Published As

Publication number Publication date
DE60308198D1 (de) 2006-10-19
ES2272992T3 (es) 2007-05-01
ITMO20020135A0 (it) 2002-05-20
PT1536916E (pt) 2007-01-31
ATE338609T1 (de) 2006-09-15
WO2003097297A2 (fr) 2003-11-27
BR0304833B1 (pt) 2013-06-11
ITMO20020135A1 (it) 2003-11-20
DE60308198T2 (de) 2007-09-13
EP1536916B1 (fr) 2006-09-06
WO2003097297A3 (fr) 2005-03-17
BR0304833A (pt) 2004-08-17

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