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WO2012016611A1 - Dispositif de protection à réglage automatique pour meule - Google Patents

Dispositif de protection à réglage automatique pour meule Download PDF

Info

Publication number
WO2012016611A1
WO2012016611A1 PCT/EP2011/003190 EP2011003190W WO2012016611A1 WO 2012016611 A1 WO2012016611 A1 WO 2012016611A1 EP 2011003190 W EP2011003190 W EP 2011003190W WO 2012016611 A1 WO2012016611 A1 WO 2012016611A1
Authority
WO
WIPO (PCT)
Prior art keywords
grinding wheel
protection device
respect
fixed portion
previous
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.)
Ceased
Application number
PCT/EP2011/003190
Other languages
English (en)
Other versions
WO2012016611A8 (fr
Inventor
Thomas Andersson
Massimiliano Giucolsi
Matteo Anzini
Paolo Gaboardi
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.)
Tenova SpA
Original Assignee
Tenova SpA
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 Tenova SpA filed Critical Tenova SpA
Priority to KR1020137002480A priority Critical patent/KR20130094296A/ko
Priority to CA2805169A priority patent/CA2805169A1/fr
Priority to US13/810,449 priority patent/US20130130603A1/en
Priority to EP11729066.8A priority patent/EP2601013A1/fr
Priority to RU2013102136/02A priority patent/RU2013102136A/ru
Priority to JP2013522117A priority patent/JP2013535347A/ja
Priority to CN2011800382871A priority patent/CN103052469A/zh
Publication of WO2012016611A1 publication Critical patent/WO2012016611A1/fr
Publication of WO2012016611A8 publication Critical patent/WO2012016611A8/fr
Anticipated expiration legal-status Critical
Ceased 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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/04—Protective covers for the grinding wheel
    • 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
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • 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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/04—Protective covers for the grinding wheel
    • B24B55/045—Protective covers for the grinding wheel with cooling means incorporated

Definitions

  • the present invention relates to a protection device for a grinding wheel, particularly but not exclusively for a rotating grinding wheel made of an abrasive materi- al .
  • the invention can in fact also be applied to other types of grinding wheels, for example also to so-called "CBNs" which have an extremely limited consumption.
  • Grinding wheels are envisaged in the field of grind- ing, for example of laminator cylinders, paper-mill cylinders, and others, for example rotating grinding wheels made of abrasive material, which act on cylinders or similar pieces being processed.
  • the grinding wheels are rotated inside protections or shelters.
  • the shelters of these grinding wheels must be designed and constructed for containing, under safety conditions, any possible fragment that can be released during the processing, also in the case of breakage or explosion of the grinding wheel during its rotation and of the engagement on the cylinder being processed.
  • these grinding wheels are currently enclosed in their own shelter, which generally consists of a fixed part (so-called hood) , and a movable part (so- called tile) in addition obviously to a covering and mov- able protection device to have access to the hood for the substitution of the grinding wheel; in particular, these covers can be fixed to the hood by means of hinges and can be opened by rotating them; or by means of guiding devices in which case they can be made to slide manually or with a motor.
  • the tile can be regulated with respect to the hood in order to limit the peripheral portion of non-protected grinding wheel to the maximum, with a variation in the diameter of the grinding wheel itself.
  • the cooling fluid necessary for the grinding process causes jets which could, with time, endanger the health of the operator if they regularly reach the latter. It is consequently necessary to minimize the exposed surface of the grinding wheel, also on the side where there is access for substitution, in order to avoid jets and the accidental leakage of the cooling fluid as much as possible.
  • a general objective of the present invention is to solve the drawbacks cited above of the known art in an extremely simple, economical and particularly functional manner .
  • a further objective of the present invention is to provide a protection device for a grinding wheel, particularly but not exclusively a rotating grinding wheel made of abrasive material, which can be automatically re- gulated, without the necessity of complex measurements entrusted to the expertise of the operator for maintaining the correct distance between grinding wheel and outer covering element (tile) and, above all, without the di- rect intervention of the operator in a difficult, tiring and dangerous operation.
  • Another objective of the present invention is to provide a protection device, for example, for a rotating grinding wheel made of abrasive material, which prevents a significant leakage of cooling liquid in the processing phase, in every configuration of the protection device and for each diameter of the grinding wheel.
  • a protection device has been con- ceived, particularly but not exclusively for a rotating grinding wheel made of abrasive material, having the characteristics specified in the enclosed claims.
  • FIG. 1 is a schematic side view of a protection device for a rotating grinding wheel made of abrasive material produced according to the invention in a closed position;
  • figure 2 is a schematic view such as that of figure 1 in which some of the parts have been sectioned to allow a better understanding of the invention
  • figure 3 is a schematic view such as that of figure 2 in which some of the parts have been sectioned to allow a better understanding of the invention and which shows the configuration convenient for the insertion of a new grinding wheel;
  • figure 4 is a schematic side view of the protection device as shown in figure 3,
  • FIG. 5a, 5b and 5c are a further view such as that of figure 1 from above and an enlarged detail which shows the grinding wheel in contact with the sensor for revealing the actual diameter of the grinding wheel before the facing and grooving cycle;
  • FIG. 6a, 6b and 6c show views similar to those of figures 5a, 5b and 5c when the grinding wheel is in contact with the diamond during the so-called “diamonding" or facing and grooving phase;
  • figures 7a, 7b and 7c show views similar to those of figures 5a, 5b and 5c which represent the phase in which the correct distance between the fixed part and movable part of the protection device is re-established to ensure the safety requirements described above.
  • these illustrate a protection device for a rotating grinding wheel made of abrasive material produced according to the invention.
  • the protection device comprises a containment structure comprising a fixed portion 11 with respect to the rotation axis of the grinding wheel assembled on the grinding machine and a movable portion 12.
  • the movable portion 12 is assembled on a pair of scraping guides 13, having a low friction coefficient, positioned on opposite sides with respect to the grinding wheel .
  • the fixed portion 11 comprises, constrained to it for example by means of hinges 14, a covering and protection element 15 of the containment structure of a grinding wheel 16.
  • a motor or driving device for example a pneumatic cylinder 17, a stem 18 with which, at its free end, it is hinged to the movable portion 12, is constrained to the fixed portion 11 of the containment structure.
  • An electromagnetic blocking unit 19 of the movable part 12 with respect to the fixed part 11 is also envisaged.
  • This element can, for example, be a stem-block, which comprises a suitable valve which, when fed with pressurized air, pre- vents the cylinder from effecting movements due, for example, to the residual compressed air inside the cylinder .
  • the motor 17 is also equipped with a sensor 26 suitable for automatically identifying the position of the movable portion 12 corresponding to a new grinding wheel.
  • a nozzle 23 for the emission of cooling and lubricating liquid between the grinding wheel 16 and piece under processing.
  • a sensor 25 for revealing the diameter of the grinding wheel before the diamonding a “diamonding” or facing and grooving unit 29 and, finally, a mechanical buffer 24 on which the movable part 12 rests during the automatic positioning cycle of the movable part 12 with respect to the fixed part 11.
  • These elements 25, 24 and 29 are in front of the movable portion 12 and near the operating opening 22 when the grinding wheel -holder trolley positions the grinding wheel itself in correspondence with the piece-holder head.
  • the grinding wheel -holder trolley is brought to a "grinding wheel substitution" position, the advance axis X of the grinding wheel is then withdrawn completely, the electromagnetic brake 19 is unblocked, the cylinder 17 is activated by means of the control unit 27 to move the movable portion 12 away from the fixed portion 11 to allow the grinding wheel 16 to be inserted. In this phase the cylinder goes to the run-end. All the above operations, except for the opening of the covering element 15, can be effected sequentially or au- tomatically, once the specific grinding wheel substitution procedure has been activated on the control unit 27.
  • the covering element 15 is closed and firmly fixed by means of the knobs 21 or another equivalent blocking device.
  • the movable portion 12 is brought back onto the fixed portion 11 until the sensor 26 identifies the correct starting operative position on the basis of the maximum value of the diameter of the grinding wheel 16 used.
  • the cylinder 17 is then stopped and the electromagnetic blockage unit 19 is activated (figure 1) .
  • the operating cycle initiates with the intervention of the grinding wheel 16 for example on a cylinder to be ground (not shown) .
  • the diameter of the grinding wheel 16 is controlled by control means of the whole grinding machine consisting of a CNC system, schematized in 27, and when there is a wear of 2-3 mm, a warning/alarm is visualized on a display 28 asking the operator to effect a procedure for reestablishing the safety distance between the movable portion 12 and the fixed portion 11 as soon as possible, i.e. at the end of the grinding cycle underway.
  • the regulation of the movable part 12 with respect to the fixed part 11 can, for example, be effected by means of an automatic cycle managed by the control system 27 after requesting the operator; it is composed of the following phases:
  • the grinding machine positions the grinding wheel-holder trolley so that the grinding wheel is in correspondence with the sensor 25 situated onboard the piece-holder head.
  • the advance axis X of the grinding wheel moves the grinding wheel itself towards the sensor.
  • the advance movement stops and the control system 27 on the basis of the position of the advance axis X of the grinding wheel and original diameter of the new grinding wheel, calculates the present diameter.
  • the grinding wheel -holder trolley is positioned so that the grinding wheel is in correspondence with the facing and grooving unit 29 situated onboard the piece-holder head and the facing and grooving is effected automatically.
  • the control system 27 automatically calculates the decrease in the diameter of the grinding wheel in relation to the increase in the advance axis X of the grinding wheel.
  • the grinding wheel is positioned so as to put the movable part 12 in correspondence with the reference 24 situated onboard the piece-holder head until it touches it.
  • the brake 19 is unblocked and the advance axis X of the grinding wheel advances until the movable part 12 touches the reference 24.
  • the control system 27 activates the advance axis X of the grinding wheel which "pushes" the movable part 12 which, as it is not braked and the piston 17 is not charged, moves towards the fixed part 11 positioning the movable part 12 at the desired distance from the grinding wheel.
  • the run of the advance axis X of the grinding wheel necessary for effecting this operation is calculated automatically by the control system 27.
  • the magnetic blocking unit 19 is activated.
  • the operating cycle initiates with the intervention of the grinding wheel 16. It can therefore be understood how the correct position of the protection device is imparted giving the operator more protection in the case of explosion of the grinding wheel and preventing the operator from having any contact with fragments made of abrasive material . Furthermore, the safety of always operating at the correct distance between the grinding wheel 16 and containment structure 11, 12, provides greater control on the emission of the cooling liquid onto the grinding wheel 16 and onto the piece, minimizing the jets outside the machine and damaging the operator's health.
  • the invention can be indifferently applied to hoods with both a sliding and rotating cover.
  • the protection scope of the invention is therefore delimited by the enclosed claims.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Braking Arrangements (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)

Abstract

La présente invention concerne un dispositif de protection pour une meule, comprenant une structure de retenue équipée d'une ouverture de fonctionnement (22) pour une meule (16), ladite structure de retenue comprenant une partie fixe (11) et une partie mobile (12) qui peut être déplacée par rapport à la partie fixe (11) au moyen d'un moteur (17) et qui peut être bloquée par rapport à la première partie fixe (11) au moyen d'une unité de blocage magnétique (19). Le dispositif comprend également un capteur (26), conçu pour détecter automatiquement la position de la partie mobile (11), des moyens de commande (27) de l'ensemble du dispositif étant également envisagés.
PCT/EP2011/003190 2010-08-02 2011-06-29 Dispositif de protection à réglage automatique pour meule Ceased WO2012016611A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
KR1020137002480A KR20130094296A (ko) 2010-08-02 2011-06-29 자동-조절식 그라인딩 휠용 보호 장치
CA2805169A CA2805169A1 (fr) 2010-08-02 2011-06-29 Dispositif de protection a reglage automatique pour meule
US13/810,449 US20130130603A1 (en) 2010-08-02 2011-06-29 Automatically adjustable protection device for a grinding wheel
EP11729066.8A EP2601013A1 (fr) 2010-08-02 2011-06-29 Dispositif de protection à réglage automatique pour meule
RU2013102136/02A RU2013102136A (ru) 2010-08-02 2011-06-29 Автоматически регулируемое защитное устройство для шлифовального круга
JP2013522117A JP2013535347A (ja) 2010-08-02 2011-06-29 自動調整可能な砥石車用保護デバイス
CN2011800382871A CN103052469A (zh) 2010-08-02 2011-06-29 用于研磨轮的可自动调节的保护设备

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2010A001458A IT1401503B1 (it) 2010-08-02 2010-08-02 Dispositivo di protezione per una mola a disco
ITMI2010A001458 2010-08-02

Publications (2)

Publication Number Publication Date
WO2012016611A1 true WO2012016611A1 (fr) 2012-02-09
WO2012016611A8 WO2012016611A8 (fr) 2012-08-16

Family

ID=43739489

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/003190 Ceased WO2012016611A1 (fr) 2010-08-02 2011-06-29 Dispositif de protection à réglage automatique pour meule

Country Status (9)

Country Link
US (1) US20130130603A1 (fr)
EP (1) EP2601013A1 (fr)
JP (1) JP2013535347A (fr)
KR (1) KR20130094296A (fr)
CN (1) CN103052469A (fr)
CA (1) CA2805169A1 (fr)
IT (1) IT1401503B1 (fr)
RU (1) RU2013102136A (fr)
WO (1) WO2012016611A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5190106B2 (ja) * 2010-12-24 2013-04-24 コマツＮｔｃ株式会社 研削盤の飛散防止構造
CN105312989A (zh) * 2015-11-30 2016-02-10 周建绿 一种具有限位功能的建筑钢筋打磨装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD227076A1 (de) * 1984-09-26 1985-09-11 Werkzeugmaschinenbau Fz Einrichtung zum selbsttaetigen nachstellen des schutzschirms einer schleifscheibenschutzhaube
GB2224679A (en) * 1988-11-10 1990-05-16 Okamoto Machine Tool Works Machine tool table incorporating a work holder
JPH0671056U (ja) * 1993-03-19 1994-10-04 フジオーゼックス株式会社 砥石車用カバー
WO2008032333A1 (fr) * 2006-09-13 2008-03-20 Uttam Sarda Système de maintien de pièce électromagnétique permanent conçu pour fixer par serrage une ou plusieurs pièces ferromagnétiques et pour détecter simultanément un déplacement

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2613160A1 (de) * 1976-03-27 1977-10-06 Karstens Georg Messgeraete Schutzvorrichtung fuer schleifmaschinen
JPS61188077A (ja) * 1985-02-14 1986-08-21 Alps Electric Co Ltd ツル−イング装置
JP2566245B2 (ja) * 1987-07-09 1996-12-25 豊田工機株式会社 砥石前カバ−補正装置
DE4017716A1 (de) * 1990-06-01 1991-12-05 Diskus Werke Frankfurt Main Ag Vorrichtung zur kuehlschmiermittelzufuhr beim hochgeschwindigkeits-umfangschleifen von aussenkonturen
DE4106009C1 (fr) * 1991-02-26 1992-08-13 Elge Elektronik-Geraetewerk Gmbh & Co, 8819 Schopfloch, De
US6636153B1 (en) * 2000-07-26 2003-10-21 Simon C. Barton Sensing system for magnetic clamping devices
JP2006068838A (ja) * 2004-08-31 2006-03-16 Toyoda Mach Works Ltd 砥石ガード装置
DE102006041671B4 (de) * 2006-09-06 2018-03-29 Robert Bosch Gmbh Schutzhaube einer Handwerkzeugmaschine
JP3138361U (ja) * 2007-10-18 2007-12-27 株式会社丸仲鉄工所 刃物研磨装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD227076A1 (de) * 1984-09-26 1985-09-11 Werkzeugmaschinenbau Fz Einrichtung zum selbsttaetigen nachstellen des schutzschirms einer schleifscheibenschutzhaube
GB2224679A (en) * 1988-11-10 1990-05-16 Okamoto Machine Tool Works Machine tool table incorporating a work holder
JPH0671056U (ja) * 1993-03-19 1994-10-04 フジオーゼックス株式会社 砥石車用カバー
WO2008032333A1 (fr) * 2006-09-13 2008-03-20 Uttam Sarda Système de maintien de pièce électromagnétique permanent conçu pour fixer par serrage une ou plusieurs pièces ferromagnétiques et pour détecter simultanément un déplacement

Also Published As

Publication number Publication date
RU2013102136A (ru) 2014-09-10
KR20130094296A (ko) 2013-08-23
JP2013535347A (ja) 2013-09-12
US20130130603A1 (en) 2013-05-23
WO2012016611A8 (fr) 2012-08-16
CN103052469A (zh) 2013-04-17
EP2601013A1 (fr) 2013-06-12
CA2805169A1 (fr) 2012-02-09
IT1401503B1 (it) 2013-07-26
ITMI20101458A1 (it) 2012-02-03

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