EP2915630A1 - Bride de maintien de roues pour meules boisseaux, avec système de déverrouillage rapide de la roue - Google Patents

Bride de maintien de roues pour meules boisseaux, avec système de déverrouillage rapide de la roue Download PDF

Info

Publication number: EP2915630A1
Authority: EP; European Patent Office
Prior art keywords: wheel; flange; support; rotation; block
Prior art date: 2014-03-03
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

EP15156979.5A

Other languages

German (de)

English (en)

Other versions

EP2915630B1 (fr

Inventor

Dino Zandonella Necca

Ferruccio Gonzo

Werner Ricciolini

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.)

ADI SpA

Original Assignee

ADI 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.)

2014-03-03

Filing date

2015-02-27

Publication date

2015-09-09

2015-02-27 Application filed by ADI SpA filed Critical ADI SpA

2015-02-27 Priority to PL15156979T priority Critical patent/PL2915630T3/pl

2015-09-09 Publication of EP2915630A1 publication Critical patent/EP2915630A1/fr

2017-01-04 Application granted granted Critical

2017-01-04 Publication of EP2915630B1 publication Critical patent/EP2915630B1/fr

Status Active legal-status Critical Current

2035-02-27 Anticipated expiration legal-status Critical

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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
- B24B45/00—Means for securing grinding wheels on rotary arbors
- B24B45/006—Quick mount and release means for disc-like wheels, e.g. on power tools
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
- B24D7/16—Bushings; Mountings

Definitions

the present invention relates to a wheel-holder flange for grinding cup wheels provided with a system for the quick release of the wheel from the flange, having the characteristics stated in the preamble to Claim 1, which is the principal claim.
the invention is particularly, but not exclusively, applicable to the field of grinding for machining materials in sheet form, which have to be machined at their edges by grinding operations in order to bring the workpieces to the desired size.
These grinding operations generally require a plurality of grinding positions, in order to distribute the removal of material over a plurality of points or in order to execute a progressive finishing sequence.
the sheets to be ground to size and subjected to finishing are square or rectangular in shape, and are processed on high-output automatic lines.
Machines used for machining tiles such as tiles made of ceramic material, are known as trimmers, while those used for glass sheets are called bilateral or straight grinders, according to their configuration.
the aforesaid system is also used for machining other materials, known in the technical field by the English names of "engineered stone” and "ultra compact surface materials”.
the invention is particularly applicable to the aforementioned grinding machines which use grinding cup wheels.
Machines using cup wheels usually comprise different mandrels, on which the wheels are fitted, on each side.
the number of mandrels per side varies, for example, from 4 to 8, giving a total of 16 or 32 wheels per machine.
Similar configurations may also be found in machines (of the bilateral type) for machining glass sheets. There are configurations having a greater number of wheels than those mentioned above, both in the aforesaid types of machines and in other applications.
the wheels are normally centred on a shaft and are fastened to it by tightening a series of screws for fastening the wheel to a wheel-holder flange, which in turn is fixed in rotation to the shaft of a motor or of a rotation transmission system.
the wheels are typically protected by a safety housing system, which is also used for the containment of the coolant liquid. Normally, the protection system does not facilitate access to the wheel by maintenance personnel if the wheel on the flange has to be maintained or replaced.
One of the main objects of the invention is to simplify the operation of replacing the wheel tool on machines of the aforesaid type, thereby also making this operation faster. This is because, owing to the considerable number of wheels mounted on these machines, the time required for tool changing results in machine stoppages which may adversely affect the output of the machining line. Additionally, in order to increase the speed of movement of the workpieces, and hence the output, there is a tendency to increase the number of grinding stations, to provide better distribution of the removal of material.
the object of the invention is therefore to provide a wheel-holder flange for cup wheels which is structurally and functionally designed to overcome the aforesaid limitations of the cited prior art.
the number 1 indicates the whole of a first example of a wheel-holder flange for a cup wheel 2, made in accordance with the present invention.
the cup wheel 2 is of the type comprising a disc-shaped support 3, substantially axially symmetrical with a main axis X, pierced centrally so as to have an annular configuration. From one of the opposite faces of the support 3 there extends the abrasive material, shaped for example in the form of a ring with a cylindrical shell 4, applied to the support by adhesive bonding, welding or moulding, or by any other suitable fastening system.
the wheel 2 can be locked removably on the flange 1, coaxially with the latter, so as to be fixed in rotation about an axis of rotation coinciding with the main axis X.
the flange is designed to be fixed in rotation to a driving shaft (not shown) by means of which the flange and cup wheel assembly is made to rotate about the axis X.
the flange 1 is also disc-shaped, with a central through hole 5 for coupling the flange to the driving shaft, and can be fastened with the cup wheel 2 by means of a first and a second locking device, indicated by 6 and 7 respectively, which are described in detail below.
the first device 6 is designed for locking the wheel support 3 on the flange 1 by magnetic attraction. It conveniently comprises a plurality of permanent magnets, all indicated by 8, positioned with a regular angular intervals along an outer circumferential band of the flange 1, so that each has a front surface 8a for contacting a corresponding surface portion of the wheel support. Respective cavities, indicated by 8b, are provided in the flange 1 to house the corresponding magnets 8. Each magnet 8 is fastened to the flange in a removable manner, for example by using a respective screw means 8c engaged in a corresponding threaded hole 8d provided in the flange.
the number and sizes of the magnets 8 are selected in such a way that the magnetic locking force is sufficient to ensure locking between the wheel and the flange, in opposition to the stress usually generated by the abrasion forces exerted by the workpiece on the wheel.
18 magnets are conveniently provided for a wheel measuring 300 mm in diameter, with an attractive force per unit of about 80 N, giving a total force of about 1440 N. With smaller wheel diameters, it may be convenient to choose a smaller number of magnets.
the number 9 indicates a cut-out formed on the outer circumferential edge between the flange 1 and the wheel 2, for receiving the end of a lever or similar detaching tool, by means of which the wheel can be removed from the flange, overcoming the magnetic locking force. This enables the wheel to be detached rapidly from the flange, which is particularly advantageous in the operation of changing the wheel.
the second device 7 is made to provide a safety locking action between the wheel and the flange, in order to prevent the detachment of the wheel during its operation in use, for example as a result of anomalous stresses that may develop during the grinding operation, and that are potentially capable of overcoming the magnetic locking force of the first device 6.
Such an event may occur, for example, if the workpiece breaks, when the workpiece may become caught in the wheel, creating stresses that may cause the wheel to be detached from the flange in a hazardous manner.
the second device 7 is designed to be activated, advantageously, by the effect of the forces of a centrifugal nature generated by the rotation of the wheel in the operating phase, and, conversely, to be disengaged, without causing any locking action, below a specified rotation speed of the wheel, and particularly when the wheel is not subject to rotation.
the device 7 comprises a pair of retaining blocks 10, which are held in such a way as to be able to slide in a limited manner on the flange 1 and are able to be radially urged, by centrifugal action, to engage in a recess 11 provided in the wheel support 3, so as to oppose relative movements between the flange and the wheel support, principally in the axial direction, during the rotary movement of the wheel.
the retaining blocks 10 are positioned on the flange in an axially symmetrical position with respect to the main axis X. Since they are structurally identical to one another, only one of them will be described in detail below.
Each block 10 is disc-shaped and, in particular, is centrally pierced so as to have an annular profile.
the block is housed in a floating manner in a respective seat 12, formed in a portion of the flange 1 located between the central hole 5 and the circumferential band containing the magnets 8.
the seats 12 are formed on a diametral plane, at 180° to one another, and are mirror-symmetrical about a plane passing through the axis X and perpendicular to the aforesaid diametral plane.
Each seat 12 is formed by a cavity made in the flange and can be closed in a removable manner by a cap 13, for example by means of fastening screws 14.
the seat 12 also has an opening 15, radially facing the support 3, the size of this opening being predetermined in such a way that the block 10 housed in the seat can project, when impelled by centrifugal action, beyond the opening 15 to a certain extent (limited by the interference between the block and the opening), so as to engage in the recess 11 formed in the support 3.
the recess 11 is formed by a groove having a closed circular profile, running circumferentially around the hole passing centrally through the support.
each seat 12 is delimited by opposed lateral walls 18, extending from the opening 15 towards an opposed end wall 19.
the opposed lateral walls 18 comprise respective opposed portions 18a of wall with an inclined profile converging towards the opening 15 of the seat.
the block 10 can be returned into the seat 12, thereby disengaging the recess 11, when, in the absence of rotation of the wheel, the flange 1 is orientated in a predetermined position such that each block is moved, by the gravitational force acting on it, along the respective inclined portion 18a.
Figure 4 shows the aforementioned position, in which the main axis of the wheel 2 is located perpendicularly to the vertical direction of action of the gravitational force and the diametral plane of symmetry intersecting the blocks 10 is substantially perpendicular to the vertical direction of action of gravity.
each block 10, subject to gravity is urged to slide along the respective inclined portion until it returns fully into the seat 12, thus disengaging the recess 11.
each block 10 engages a portion of the recess 11 indicated by L in the drawing, so as to hold the flange and the wheel support together, mainly in the axial direction, thereby opposing any relative movements tending to detach the wheel from the flange.
the device 7 therefore automatically releases the respective locking system, as described above.
the angle of inclination A, indicated in Figure 4 , of the portion 18a of the wall 18 is conveniently chosen to be greater than 20°, in the case of a configuration with two blocks.
the chosen configuration has three blocks, they are positioned at 120° to one another to provide better balancing, and the angle A is usefully chosen to be greater than 30°. According to a preferred choice, the angle A is chosen to be greater than 35°. This choice enables the blocks 10 to be disengaged from the recess 11 by orientating the wheel in a position in which, still with the axis X perpendicular to the vertical direction, one of the blocks is aligned along the vertical direction of gravitational action.
Figures 6 to 8 show a second exemplary embodiment of the invention, differing from the first substantially in the different shape of the blocks and of the seats for housing them. Details corresponding to those of the previous example are identified by the same reference numerals.
each block 10' comprises a base 20 having a cylindrical profile, from which a portion 21 with a frustoconical profile extends.
a shoulder 22 is provided between the base 20 and the portion 21, as is clearly shown in Figures 7 and 8 .
Each corresponding seat 12' in the flange 1 is formed in a cavity which has a bottom 23 with a conical profile for receiving, substantially with a positive connection, the frustoconical portion 21 of the block 10'.
each block 10' when urged radially by the centrifugal force generated by the rotation of the wheel, can slide relative to the bottom 23 of the seat, until it projects through the opening 15, so as to engage the recess 11 of the wheel support with part of its cylindrical base 20.
the frustoconical configuration of the block advantageously enables the block to be returned into the seat under the effect of gravity when the wheel, having stopped, is orientated with its main axis parallel to the vertical direction of gravitational action.
the locking device 7 with the blocks 10' enables the locking system to be released automatically once the rotation of the wheel has ceased.
the number 25 indicates a disc-shaped closing cover suitable for closing both of the seats 12', using screw clamping means 26.
each block 10, 10' prefferably be associated with resilient return means acting on the blocks to urge them towards disengagement from the respective recess.
These return means may comprise springs whose rigidity (that is to say, the elastic constant characterizing them) is chosen to be such that the resilient force acting on the block 10, 10' is overcome by centrifugal force when a predetermined speed of rotation of the wheel is reached, such that, when this speed is reached and/or exceeded, the blocks 10, 10' are urged to engage the recess 11 of the wheel support 3.
the number 30 indicates pin-like formations provided in the flange and forming anti-rotation means.
the pins 30 project frontally from the flange 1 and can engage, by frontal insertion, corresponding holes 31 provided in corresponding positions on the wheel support 3.
the pins 30 are also placed in axially symmetrical positions and at regular angular intervals along the circumferential profile of the flange 1.
the pins 30 are conveniently located along a diametral direction perpendicular to the direction of alignment of the blocks on the flange.
the anti-rotation pins enable relative rotary movements between the wheel and the flange to be prevented.
a principal advantage is that, owing to the invention, the phase of tool changing is improved in grinding machines, particularly those having cup wheels, the wheel replacement operation being simplified and made more rapid, while ensuring suitable locking of the wheel on to the wheel-holder flange during the machining phases.
the rapidity is achieved by providing a quick-release locking system.
the reduction of the wheel replacement time leads to a substantial improvement in the output of the machining line, particularly in machining lines using multiple-mandrel grinding machines designed to be fitted with large numbers of wheels.

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Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Polishing Bodies And Polishing Tools (AREA)

EP15156979.5A 2014-03-03 2015-02-27 Bride de maintien de roues pour meules boisseaux, avec système de déverrouillage rapide de la roue Active EP2915630B1 (fr)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
PL15156979T PL2915630T3 (pl)	2014-03-03	2015-02-27	Kołnierz trzymający ściernicę do ściernic garnkowych, z układem szybkiego uwalniania ściernicy

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
ITPD20140046		2014-03-03

Publications (2)

Publication Number	Publication Date
EP2915630A1 true EP2915630A1 (fr)	2015-09-09
EP2915630B1 EP2915630B1 (fr)	2017-01-04

Family

ID=50693848

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP15156979.5A Active EP2915630B1 (fr)	2014-03-03	2015-02-27	Bride de maintien de roues pour meules boisseaux, avec système de déverrouillage rapide de la roue

Country Status (3)

Country	Link
EP (1)	EP2915630B1 (fr)
ES (1)	ES2620499T3 (fr)
PL (1)	PL2915630T3 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JP2016068170A (ja) *	2014-09-29	2016-05-09	株式会社ディスコ	研削装置
CN106141830A (zh) *	2015-05-13	2016-11-23	通用汽车环球科技运作有限责任公司	研磨机组件
EP3216561A1 (fr)	2016-03-11	2017-09-13	Blastrac B.V.	Disque de meulage double face avec système de changement rapide
IT201800009651A1 (it) *	2018-10-22	2020-04-22	Bovone Diamond Tools Srl	Dispositivo di aggancio per utensili di lavorazione
CN111482900A (zh) *	2019-01-25	2020-08-04	重庆强泰砂轮制造有限公司	一种螺栓紧固砂轮
CN113260483A (zh) *	2018-12-20	2021-08-13	3M创新有限公司	附接毂、支撑垫和研磨盘
CN115781516A (zh) *	2023-02-07	2023-03-14	强信机械科技(莱州)有限公司	五轴数控磨削设备
CN117464558A (zh) *	2023-11-08	2024-01-30	江苏省常州技师学院	一种砂轮快速安装结构
TWI916598B (zh)	2021-07-27	2026-03-01	日商迪思科股份有限公司	研削輪的裝設機構

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US11458595B2 (en)	2018-11-19	2022-10-04	Husqvarna Ab	Tool attachment means for power trowels

Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
BE558762A (fr) *
DE2904114A1 (de) *	1979-02-03	1980-08-14	Loeffler Maschbau Ohg	Schleifkopf
JP2003145432A (ja) *	2001-11-19	2003-05-20	Sanwa Kenma Kogyo Kk	工具アダプタ及びアダプタ付回転工具
EP2524766A2 (fr) *	2011-05-18	2012-11-21	Herramientas de Diamante, S.A.	Meule en deux pièces pour usinage

2015
- 2015-02-27 ES ES15156979.5T patent/ES2620499T3/es active Active
- 2015-02-27 PL PL15156979T patent/PL2915630T3/pl unknown
- 2015-02-27 EP EP15156979.5A patent/EP2915630B1/fr active Active

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
BE558762A (fr) *
DE2904114A1 (de) *	1979-02-03	1980-08-14	Loeffler Maschbau Ohg	Schleifkopf
JP2003145432A (ja) *	2001-11-19	2003-05-20	Sanwa Kenma Kogyo Kk	工具アダプタ及びアダプタ付回転工具
EP2524766A2 (fr) *	2011-05-18	2012-11-21	Herramientas de Diamante, S.A.	Meule en deux pièces pour usinage

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JP2016068170A (ja) *	2014-09-29	2016-05-09	株式会社ディスコ	研削装置
CN106141830A (zh) *	2015-05-13	2016-11-23	通用汽车环球科技运作有限责任公司	研磨机组件
US9969053B2 (en)	2015-05-13	2018-05-15	GM Global Technology Operations LLC	Grinder adaptor assembly
CN106141830B (zh) *	2015-05-13	2018-11-16	通用汽车环球科技运作有限责任公司	研磨机组件
EP3216561A1 (fr)	2016-03-11	2017-09-13	Blastrac B.V.	Disque de meulage double face avec système de changement rapide
WO2020084379A1 (fr) *	2018-10-22	2020-04-30	Bovone Diamond Tools S.R.L.	Dispositif d'accrochage pour outils de travail
IT201800009651A1 (it) *	2018-10-22	2020-04-22	Bovone Diamond Tools Srl	Dispositivo di aggancio per utensili di lavorazione
CN113260483A (zh) *	2018-12-20	2021-08-13	3M创新有限公司	附接毂、支撑垫和研磨盘
CN113260483B (zh) *	2018-12-20	2023-07-21	3M创新有限公司	附接毂、支撑垫和研磨盘
CN111482900A (zh) *	2019-01-25	2020-08-04	重庆强泰砂轮制造有限公司	一种螺栓紧固砂轮
TWI916598B (zh)	2021-07-27	2026-03-01	日商迪思科股份有限公司	研削輪的裝設機構
CN115781516A (zh) *	2023-02-07	2023-03-14	强信机械科技(莱州)有限公司	五轴数控磨削设备
CN117464558A (zh) *	2023-11-08	2024-01-30	江苏省常州技师学院	一种砂轮快速安装结构

Also Published As

Publication number	Publication date
ES2620499T3 (es)	2017-06-28
PL2915630T3 (pl)	2017-06-30
EP2915630B1 (fr)	2017-01-04

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