EP3903999A1 - Verbesserte spindel für rotierende köpfe zum kalibrieren oder glätten von künstlichen oder natürlichen planen materialien - Google Patents

Verbesserte spindel für rotierende köpfe zum kalibrieren oder glätten von künstlichen oder natürlichen planen materialien Download PDF

Info

Publication number
EP3903999A1
EP3903999A1 EP21020234.7A EP21020234A EP3903999A1 EP 3903999 A1 EP3903999 A1 EP 3903999A1 EP 21020234 A EP21020234 A EP 21020234A EP 3903999 A1 EP3903999 A1 EP 3903999A1
Authority
EP
European Patent Office
Prior art keywords
spindle
sleeve
rotating
spindle shaft
transmission
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.)
Pending
Application number
EP21020234.7A
Other languages
English (en)
French (fr)
Inventor
Giambattista 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.)
Pedrini SpA ad Unico Socio
Original Assignee
Pedrini SpA ad Unico Socio
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 Pedrini SpA ad Unico Socio filed Critical Pedrini SpA ad Unico Socio
Publication of EP3903999A1 publication Critical patent/EP3903999A1/de
Pending legal-status Critical Current

Links

Images

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
    • 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
    • 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
    • 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
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/22—Equipment for exact control of the position of the grinding tool or work at the start of the grinding operation

Definitions

  • the invention relates to: an improved spindle for rotating heads for calibrating or dressing artificial or natural planar materials, such as concrete tiles, concrete blocks, ceramic tiles, natural stone sheets, processed with rotating abrasive heads, i.e., a spindle placed in rotation on the surface being processed to communicate the rotation to said heads with normal rotation axis at the planar surface to be processed, made particularly advantageous in the realization due to the high powers applied to communicate to the abrasive head mounted and rotating thereon. That is, it is advantageous in both construction and operation to perform delicate material thickness calibration operations, dressing the planar surface itself which require a high power installed on each head to realize the envisaged processing methods.
  • artificial or natural planar materials such as concrete tiles, concrete blocks, ceramic tiles, natural stone sheets
  • the state of the art comprises support and motorization spindles of rotating abrasive heads, built both for a simple planar disc conformation with abrasive elements distributed on the active surface thereof conveniently spaced apart from each other, and with calibration heads in which abrasive tools oscillating or rotating against the planar surface being processed are present.
  • these types of spindles although known for years in the state of the art, generally have a single electric motor of adequate power to put and keep in rotation the rotating abrasive head mounted thereon.
  • EP 1536916 B1 describes a rotating spindle with internal hydraulic lifting and lowering control and with a geared transmission which allows the generation of rotation to be balanced, avoiding the lateral mounting of a single motor to the spindle itself, replacing the former with the assembly of two simultaneously rotating motors.
  • the new spindle must be able to easily adjust the transmission and, at the same time, facilitate the control and maintenance thereof.
  • an improved spindle for rotating heads for calibrating or dressing artificial or natural planar materials comprising: a sleeve within which a spindle body is slidable, in turn provided with a spindle shaft at the lower end of which a rotating head with abrasive tools is applied; at least two pneumatic cylinders for positioning the spindle, i.e., the head connected thereto, on a supporting structure; fixing the sleeve to the structure of a machine on which the spindle is mounted by means of a surface adjustment flange with spherical surface; at least two electric rotation drive motors of the spindle and a transmission from said motors to the spindle shaft; said electric motors coupled in rotation to the spindle shaft each with a belt transmission; between said sleeve and said spindle shaft there is a sliding body which rotatably supports the spindle shaft and is pushed in a raised or lowered position on the planar surface
  • each front flanged support is provided with a lower support shelf rotating the lower end of a pulley keyed to the shaft of the electric motor; said lower shelf is housed within openings made in the lower sheet of the transmission box.
  • three electric motors are provided, the transmission box shaped with three tips, and three pneumatic cylinders connected to said sleeve and with the stem connected to said lower sheet of the transmission box.
  • the central groove wheel is connected and rotated with the spindle shaft by means of a hub fixed to the sliding body and provided with a rotation bearing seat to support the central groove wheel.
  • an improved spindle 1 carries the rotating head 2 at the lower end 3 thereof; it is protected by a circular cap 4 connected to a sliding body 5 in axis with the improved spindle 1; inside the sliding body is housed and rotating a spindle shaft 6 which has an end flange 7 on which an abrasive disc 8 is fixed and rotated therewith provided with abrasive sectors 9, usual for cementitious materials, to form the active part of the head.
  • the body 5 of the spindle is slidable within a sleeve 10 following the operation of pneumatic cylinders 11 connected to said sleeve and to an adjustment flange 12 on the structure 13 of the machine on which the improved spindle is mounted.
  • each piston 11 is connected with a lower sheet 15 of a transmission box 16 of the rotational motion to the spindle shaft 6; the transmission box in turn connected to said sliding body 5 of the improved spindle 1; said transmission box is completed by an upper sheet 17 which creates a boxed structure with the lower sheet and the outer closing walls 18.
  • the upper end 19 of the sleeve 10 is connected with said adjustment flange 12 in turn supported, adjusted and fixed by an annular spherical surface 20 for adjusting the improved spindle 1 and, consequently, the rotating head 2 with respect to the structure 13 of the machine.
  • the transmission box 16 encloses the underlying transmission belts 21 between a central groove wheel 22 and single pulleys 23 on each electric motor 24 which transmits the rotational motion with the belts 21;
  • the central groove wheel 22 is connected to the spindle shaft 6 and is rotatably supported, by the pulling of the belts, by a hub M, integral with said sliding body 5, and provided with a seat S for a rolling bearing visible in Figures 2 and 9 .
  • Each electric motor 24 is connected with the transmission box 16 by a front flanged support 25, which allows the electric motor to be rigidly fixed to the boxed structure of the transmission box.
  • This front flanged support also creates the support of the opposite end 26 of the pulley 23 keyed on the drive shaft 27 of each electric motor 24 so as to distance, interspersing them, the individual belts 21 which simultaneously lie on the central groove wheel 22 and, divided and equally spaced, respecting the position thereof on the groove wheel, on the pulley 23, as clearly visible in Figures 2 , 9 and 10 .
  • Figures also show a telescopic extension 28 of the sleeve 10 to protect the lower part of the sliding body 5 which penetrates a lower chamber 29 when the spindle is in the raised position as seen in Figure 9 ; the planar surface 30 being processed; horizontal adjustment screws 31 of the adjustment flange 12 on the structure of the machine 13; an axial slot 33 on the sliding body 5 in the sliding coupling inside the sleeve 10 within which a feather 34 for guiding the cylindrical coupling between the sliding body 5 and the sleeve 10 is inserted.
  • Figures 7 and 9 show two feathers of which an adjustable feather 35 which also limits the length of the lowering/lifting stroke of the head from the planar surface 30 being processed.
  • a usual water supply pipe 36, coaxial to the spindle shaft 6, for supplying the cooling water of the abrasive sectors 9 of the abrasive disc 8 are also visible.
  • the front flanged support 25 of the electric motor 24 has a lower shelf 37, which rotatably supports the opposite end 26 of the pulley 23; the lower shelf has stiffening ribs 38.
  • the front flanged support 25, with the fixing screws 39 loosened, is operated with a tension screw 40 of the belts 21 between the central groove wheel 22 and the pulley 23 mounted on said support.
  • the assembly of the improved spindle for rotating heads for calibrating or dressing artificial or natural planar materials is carried out by laying the adjustment flange 12 on the structure of the machine 13 and tightened by controlling the planarity thereof by tightening the fixing screws 32; the clearance which has the stem of the screws 32 in the seat thereof allows the fine adjustment, sliding on the spherical surface 20, of the correct vertical position of the axis of the improved spindle with respect to the processing surface, where the surfaces 30 which must be processed are laid.
  • the transmission has the belts 21 distributed interspersed with each other and simultaneously lie on the central groove wheel 22 and on each of the pulleys 23 on the drive shafts 27 of the electric motors. Since the belts are offset, the distance therebetween, on the pulleys 23, is triple the pitch between the belts on the central groove wheel, so the length of the pulleys 23 is three times the axial distance which would separate the belts adapted to transmit the torque from the shaft 27 of the electric motor 24
  • a simple assembly of a pulley with four close grooves, since each motor, as shown, requiring four belts for the transmission thereof, does not achieve a balanced transmission; in fact, the belts would lie on contiguous grooves on the central groove wheel 22, instead, an interspersed distribution of the belts 21, as seen in the Figures, allows to transmit the radial stresses on the spindle shaft 6 in a more balanced manner.
  • the tensioning of the belts of a pulley 23 with respect to the central groove wheel 22 can occur with the displacement of the flanged support 25 by the action of the tensioning screw 40 of the belts.
  • the tension is also manifested by the length of the pulley 23 with an arm not acceptable by the inner supports of the drive shaft 27 of the electric motor 24.
  • the new construction solution of supporting the opposite end 26 of the pulley allows to avoid bending overloads on the shaft of the electric motor.
  • a similar embodiment i.e., with the spacing of the belts with triple pitch makes the supporting structure with a simple flange of the state of the art unsuitable to withstand the pulling of the belts 21 with the tripled pitch thereof.
  • the belt transmission of the improved spindle 1 for rotating heads 2 for calibrating or dressing artificial or natural planar materials solves this technical problem by realizing the transmission box 16 containing the belt transmissions 21 for electric motors 24 mounted on the spindle, as described and depicted above.
  • this box has a three-tips conformation ( Figure 4 ) forming the outer closing walls 18, between the lower sheets 15 and upper sheets 17, a resistant frame; furthermore, the lower sheet has openings 41 for the passage of the lower shelf 37 of rotating support of each individual pulley 23.
  • the assembly of the belts 21 is carried out from above with the transmission box 16 without the central cover 42. It is fixed to the underlying upper sheet 17 of the transmission box with screws 43 which make the upper sheet and the cover integral, closing the transmission structure, i.e., making it boxed and resistant to the tensioning stresses of the belts 21 when properly tensioned. Furthermore, this central cover 42 allows the modification of the transmission ratio by replacing the central groove wheel 22, if necessary, or allows a possible rapid intervention to replace one or more damaged belts.
  • the boxed structure of the transmission box 16 is rigid to support the pulling of the belts 21 and the tensions induced by the transmission of the driving torque between the pulleys 23 and the central groove wheel 22. That is, even if rigid, the transmission box 16 allows both the housing of the front flanged support 25 of the electric motor 24, and the insertion in the correct position of the lower shelf 37 for supporting and sustaining the rotation of the pulley 23 keyed on the shaft of the electric motor 27.
  • the realization of the transmission box 16 with the outer closing walls 18 to rigidly join the lower sheet 15 and the upper sheet 17, is rigid but also allows maximum accessibility to the transmission with the upper central closure of the cover 42, so as to access the internal compartment where the central groove wheel 22 is located, the upper end of the spindle shaft 6, with the hub of the sliding body M and the relative rotating support bearing of the spindle shaft.
  • a machine for calibrating or dressing artificial or natural planar materials comprises at least one pair of spindles 1 facing the planar surface 30 and aligned in the path of the material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP21020234.7A 2020-04-27 2021-04-26 Verbesserte spindel für rotierende köpfe zum kalibrieren oder glätten von künstlichen oder natürlichen planen materialien Pending EP3903999A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102020000009079A IT202000009079A1 (it) 2020-04-27 2020-04-27 Mandrino perfezionato per teste rotanti di calibratura o levigatura di materiali planari artificiali o naturali

Publications (1)

Publication Number Publication Date
EP3903999A1 true EP3903999A1 (de) 2021-11-03

Family

ID=71575633

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21020234.7A Pending EP3903999A1 (de) 2020-04-27 2021-04-26 Verbesserte spindel für rotierende köpfe zum kalibrieren oder glätten von künstlichen oder natürlichen planen materialien

Country Status (2)

Country Link
EP (1) EP3903999A1 (de)
IT (1) IT202000009079A1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1536916B1 (de) 2002-05-20 2006-09-06 Luigi Pedrini Eine inhärent ausgeglichene spindel für werkzeugköpfe zum eichen, glätten oder polieren von steinplatten und/oder von keramikfliesen
EP1849557A2 (de) 2006-04-27 2007-10-31 SR Schindler Steinbearbeitungsmaschinen - Anlagentechnik GmbH Vorrichtung sowie Verfahren zur stationären Oberflächenbearbeitung von Werkstücken aus Natur- oder Kunststein durch Fräsen und/oder Schleifen
WO2015124990A1 (en) 2014-02-18 2015-08-27 Pedrini Spa Ad Unico Socio Improved mandrel for sizing, smoothing or polishing stone materials with rotating abrasive heads
CN106737152A (zh) * 2016-12-23 2017-05-31 泉州智信专利技术开发有限公司 一种具有防尘的磨头及磨光机

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1536916B1 (de) 2002-05-20 2006-09-06 Luigi Pedrini Eine inhärent ausgeglichene spindel für werkzeugköpfe zum eichen, glätten oder polieren von steinplatten und/oder von keramikfliesen
EP1849557A2 (de) 2006-04-27 2007-10-31 SR Schindler Steinbearbeitungsmaschinen - Anlagentechnik GmbH Vorrichtung sowie Verfahren zur stationären Oberflächenbearbeitung von Werkstücken aus Natur- oder Kunststein durch Fräsen und/oder Schleifen
WO2015124990A1 (en) 2014-02-18 2015-08-27 Pedrini Spa Ad Unico Socio Improved mandrel for sizing, smoothing or polishing stone materials with rotating abrasive heads
CN106737152A (zh) * 2016-12-23 2017-05-31 泉州智信专利技术开发有限公司 一种具有防尘的磨头及磨光机

Also Published As

Publication number Publication date
IT202000009079A1 (it) 2021-10-27

Similar Documents

Publication Publication Date Title
CN107530903A (zh) 用于加工板坯材料的机器
ES2283644T3 (es) Maquina de acabado para baldosas ceramicas cocidas.
JP6377869B1 (ja) 平行及び対向するように装着される２つの砥石が容易に交換できる連続圧縮線ばね研磨装置
IT201800007773A1 (it) Testa di taglio e bisellatura, macchina multiassiale con tale testa di taglio e bisellatura e relativo metodo di taglio e bisellatura
EP3107687B1 (de) Verbesserter dorn zum kalibrieren, glätten oder polieren von steinmaterialien mit rotierenden schleifköpfen
CN101219524B (zh) 全自动钻石磨抛机
CN103801999A (zh) 无级磨抛装置
EP3903999A1 (de) Verbesserte spindel für rotierende köpfe zum kalibrieren oder glätten von künstlichen oder natürlichen planen materialien
CN204772085U (zh) 行星齿轮式双面研磨或抛光机
WO2009036785A1 (en) Rotating arrangement for a supply line to a toolholder for a machine for working block or slab materials
CN201566048U (zh) 多功能石材加工机械
CN203696639U (zh) 无级磨抛装置
KR100591269B1 (ko) 밸브 디스크 연마 가공기
CN206047812U (zh) 一种异形砂光机构
EP3530426A1 (de) Profiliermaschine
CN201055973Y (zh) 一种玻璃喷沙机
KR20130017522A (ko) 다엽식 석재절삭기
CN207771514U (zh) 一种可调节的砂带抛光机
CN206811233U (zh) 一种金刚石切割机
KR20010007449A (ko) 유리 또는 석재류 플레이트 재료 등의 에지-가공용 양면에지형 기계
EP1937452B1 (de) Werkzeugmaschine für die oberflächenbearbeitung von produkten aus stein o. ä.
EP1536916B1 (de) Eine inhärent ausgeglichene spindel für werkzeugköpfe zum eichen, glätten oder polieren von steinplatten und/oder von keramikfliesen
JP2877925B2 (ja) 板ガラスの研磨装置
CN209062709U (zh) 打磨装置及拣选系统
CN219358896U (zh) 一种刀具研磨机夹具的角度调节结构

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

B565 Issuance of search results under rule 164(2) epc

Effective date: 20210930

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20220329

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20240319