EP2331290A1 - Grinding wheel, particularly for grinding work at a high feed speed - Google Patents
Grinding wheel, particularly for grinding work at a high feed speedInfo
- Publication number
- EP2331290A1 EP2331290A1 EP09787808A EP09787808A EP2331290A1 EP 2331290 A1 EP2331290 A1 EP 2331290A1 EP 09787808 A EP09787808 A EP 09787808A EP 09787808 A EP09787808 A EP 09787808A EP 2331290 A1 EP2331290 A1 EP 2331290A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- grinding wheel
- grinding
- ducts
- outside wall
- abrasive
- 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.)
- Withdrawn
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
- B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
- B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
- B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
- B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
- B24B9/10—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of plate glass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
- B24D5/10—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor with cooling provisions, e.g. with radial slots
Definitions
- the present invention concerns a grinding wheel particularly designed for grinding work at a high feed speed, having the characteristics mentioned in the preamble of the main claim.
- the particular nature of the grinding work also requires an abrasive surface of the grinding wheel, that surface which comes into contact with the workpiece to be subjected to grinding, extending continuously over the cylindrical outside wall of the body of the grinding wheel.
- the principal aim of the invention is that of providing a grinding wheel structurally and functionally designed to obtain improved distribution of the cooling/lubricating liquid in the area of contact with the workpiece being processed, in order to convey the liquid more homogeneously and to obtain, even in the case of high feed speeds of the grinding wheel, a greater reduction in chipping of the workpieces being processed and a longer service life of the tool, compared with known solutions.
- - Figure 1 is a perspective view from above of a grinding wheel produced according to the invention.
- - Figure 4 is a partial perspective view, on an enlarged scale compared with
- the reference 1 indicates as a whole a grinding wheel designed for grinding work at a high feed speed, which is produced according to the present invention.
- the grinding wheel 1 comprises a discoid body 2, axially symmetrical with respect to a main axis X, about which the grinding wheel can be set in rotation in the processing stages.
- the discoid body 2 is provided with a central hub with through holes 3 for fixing to a drive shaft, not shown.
- the discoid body 2 also extends between two axially opposed faces 2a, 2b, between which is defined a cylindrical outside wall 4 bearing the abrasive material suitable for the grinding operations.
- a seat 5 is provided which runs circumferentially, and wherein the abrasive material 6 is disposed, the material appearing on the cylindrical outside wall with an abrasive surface, indicated by 6a, which extends circumferentially, without a gap, in the region of the outside wall 4.
- the surface 6a has in axial section ( Figure 2) a curved transverse profile with a concavity facing towards the workpiece (not shown) to be subjected to grinding.
- the profile is designed for the grinding of corresponding edges with convex profile, such as those provided on the peripheral edges of the windows of motor vehicles, the grinding of which is conveniently carried out with the grinding wheel of the invention.
- the grinding wheel comprises a plurality of ducts 7, extending radially in the discoid body 2, and one of which can be seen in section in Figure 2 (this figure shows a half section, by reason of the axial symmetry). Only one of the ducts 7 will be described in detail hereinafter, since they are identical in structure and function.
- Each duct 7 extends radially in the body 2 for a radial portion extending between a first end 7a, at which the duct opens into the surface 6a of the outside wall 4, and an opposed end 7b, communicating with a cavity or recess 8.
- Said recess has an annular configuration and extends circumferentially on the face 2a of the disc, coaxially with the axis X.
- the recess 8 opens to the outside via a mouth 8a in the shape of an annular rim concentric with the axis X.
- the volume of the recess 8 is selected to be such that the cavity forms a kind of reservoir of predetermined capacity, fed via a stationary delivery duct
- the capacity of the recess 8 ensures that in each duct 7 a corresponding quantity of liquid is distributed homogeneously, and is then conveyed by centrifugal action (during the rotation of the disc) from the ducts 7 onto the abrasive surface 6a, thus ensuring the homogeneous distribution of liquid onto the surface itself.
- the liquid may consist of a lubricating or cooling liquid or, as a further alternative, of a liquid having both lubricating and cooling properties.
- a preferred example provides for the liquid to be water.
- the ducts 7 are provided so as to pass through the abrasive material 6, until they reach the end section communicating with the outside of the outside wall 4.
- the ducts 7 conveniently have a cross-section of circular shape (for example are produced as simple radial through holes) or of elliptical shape or, as a further alternative, may have a cross-section of polygonal, for example rectangular, shape.
- the number and dimension of the ducts provided in the discoid body 2 may further vary according to specific requirements and to the rotation speeds or the feed speeds provided for conducting the grinding wheel 1 in the grinding phases, and also according to the dimensions of the grinding wheel and of the window edge to be subjected to grinding.
- a preferred example provides for twelve ducts 7 disposed at a regular angular pitch and having a circular cross-section, as shown in Figure 2.
- the invention thus achieves the aims proposed, obtaining the advantages claimed above with reference to the prior art.
- a principal advantage lies in the fact of being able to obtain, in grinding wheels at high feed speeds, a distribution of cooling/lubricating liquid of improved homogeneity, with which it is possible to obtain a greater reduction in chipping of the ground window in addition to a longer service life of the grinding wheel. This is particularly noticeable with particularly high feed speeds, also in ranges from 14 m/min. up to 36 m/min.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Disintegrating Or Milling (AREA)
- Glass Compositions (AREA)
Abstract
A grinding wheel is described, particularly for grinding work at a high feed speed, comprising a discoid body (2) between the axially opposed faces (2a, 2b) of which an outside wall (4) of cylindrical profile is defined, bearing the abrasive grinding material, and wherein the abrasive material is disposed circumferentially on the outside wall without a gap. The grinding wheel also comprises a plurality of ducts (7) extending radially in the discoid body (2), opening onto the outside wall (4) and also passing through the abrasive material, so as to constitute ducts for conveying a cooling and/or lubricating liquid onto the abrasive outer surface of the outside wall.
Description
Grinding wheel, particularly for grinding work at a high feed speed Technical field
The present invention concerns a grinding wheel particularly designed for grinding work at a high feed speed, having the characteristics mentioned in the preamble of the main claim. Technological background
In the relevant technical field grinding wheels made of abrasive material are known which are designed for grinding work at a high feed speed. A typical process of the aforesaid type is that relating to the grinding of the edges of windows for motor vehicles. In these processes the feed speed reaches high levels, for example from 14 m/min. to 36 m/min., this range being cited solely by way of example.
The particular nature of the grinding work also requires an abrasive surface of the grinding wheel, that surface which comes into contact with the workpiece to be subjected to grinding, extending continuously over the cylindrical outside wall of the body of the grinding wheel.
When using grinding wheels of the type indicated, in order to reduce chipping of the glass being processed and increase the service life of the tool, provision is made for the use of lubricating and/or cooling liquids, conveyed in the region of the point of working contact. Description of the invention
The principal aim of the invention is that of providing a grinding wheel structurally and functionally designed to obtain improved distribution of the cooling/lubricating liquid in the area of contact with the workpiece being processed, in order to convey the liquid more homogeneously and to obtain,
even in the case of high feed speeds of the grinding wheel, a greater reduction in chipping of the workpieces being processed and a longer service life of the tool, compared with known solutions.
This aim is achieved by the invention by means of a grinding wheel produced according to the following claims.
Brief description of the drawings
Further characteristics and advantages of the invention will become clearer from the following detailed description of a preferred exemplary embodiment thereof, illustrated by way of non-limiting example with reference to the appended drawings, in which:
-Figure 1 is a perspective view from above of a grinding wheel produced according to the invention;
-Figure 2 is an axial half section view of the grinding wheel of Figure 1,
-Figure 3 is a view on an enlarged scale of the detail indicated by the arrow A in Figure 2,
-Figure 4 is a partial perspective view, on an enlarged scale compared with
Figure 2, of a detail of the grinding wheel of Figure 1.
Preferred embodiment of the invention
With reference to the drawings mentioned, the reference 1 indicates as a whole a grinding wheel designed for grinding work at a high feed speed, which is produced according to the present invention.
The grinding wheel 1 comprises a discoid body 2, axially symmetrical with respect to a main axis X, about which the grinding wheel can be set in rotation in the processing stages. The discoid body 2 is provided with a central hub with through holes 3
for fixing to a drive shaft, not shown.
The discoid body 2 also extends between two axially opposed faces 2a, 2b, between which is defined a cylindrical outside wall 4 bearing the abrasive material suitable for the grinding operations. In more detail, in the outside wall 4 a seat 5 is provided which runs circumferentially, and wherein the abrasive material 6 is disposed, the material appearing on the cylindrical outside wall with an abrasive surface, indicated by 6a, which extends circumferentially, without a gap, in the region of the outside wall 4. Preferably, the surface 6a has in axial section (Figure 2) a curved transverse profile with a concavity facing towards the workpiece (not shown) to be subjected to grinding. The profile is designed for the grinding of corresponding edges with convex profile, such as those provided on the peripheral edges of the windows of motor vehicles, the grinding of which is conveniently carried out with the grinding wheel of the invention.
According to a principal characteristic of the invention, the grinding wheel comprises a plurality of ducts 7, extending radially in the discoid body 2, and one of which can be seen in section in Figure 2 (this figure shows a half section, by reason of the axial symmetry). Only one of the ducts 7 will be described in detail hereinafter, since they are identical in structure and function.
Each duct 7 extends radially in the body 2 for a radial portion extending between a first end 7a, at which the duct opens into the surface 6a of the outside wall 4, and an opposed end 7b, communicating with a cavity or recess 8. Said recess has an annular configuration and extends circumferentially on
the face 2a of the disc, coaxially with the axis X.
On the face 2a of the disc, the recess 8 opens to the outside via a mouth 8a in the shape of an annular rim concentric with the axis X.
The volume of the recess 8 is selected to be such that the cavity forms a kind of reservoir of predetermined capacity, fed via a stationary delivery duct
(not shown) supplying a flow of liquid to the inside of the recess, via the mouth
8a. The capacity of the recess 8 ensures that in each duct 7 a corresponding quantity of liquid is distributed homogeneously, and is then conveyed by centrifugal action (during the rotation of the disc) from the ducts 7 onto the abrasive surface 6a, thus ensuring the homogeneous distribution of liquid onto the surface itself.
The liquid may consist of a lubricating or cooling liquid or, as a further alternative, of a liquid having both lubricating and cooling properties. A preferred example provides for the liquid to be water. Through the centrifugal action due to the speed of rotation, the liquid is then brought, homogeneously distributed, to the point of contact between the abrasive surface 6a and the workpiece to be ground.
It should also be noted that the ducts 7 are provided so as to pass through the abrasive material 6, until they reach the end section communicating with the outside of the outside wall 4.
The ducts 7 conveniently have a cross-section of circular shape (for example are produced as simple radial through holes) or of elliptical shape or, as a further alternative, may have a cross-section of polygonal, for example rectangular, shape. The number and dimension of the ducts provided in the discoid body 2
may further vary according to specific requirements and to the rotation speeds or the feed speeds provided for conducting the grinding wheel 1 in the grinding phases, and also according to the dimensions of the grinding wheel and of the window edge to be subjected to grinding. A preferred example provides for twelve ducts 7 disposed at a regular angular pitch and having a circular cross-section, as shown in Figure 2.
The invention thus achieves the aims proposed, obtaining the advantages claimed above with reference to the prior art.
A principal advantage lies in the fact of being able to obtain, in grinding wheels at high feed speeds, a distribution of cooling/lubricating liquid of improved homogeneity, with which it is possible to obtain a greater reduction in chipping of the ground window in addition to a longer service life of the grinding wheel. This is particularly noticeable with particularly high feed speeds, also in ranges from 14 m/min. up to 36 m/min.
Claims
1. A grinding wheel, particularly for grinding work at a high feed speed, comprising a discoid body (2) between the axially opposed faces (2a, 2b) of which an outside wall (4) of cylindrical profile is defined, bearing the abrasive grinding material, and wherein the abrasive material is disposed circumferentially on said outside wall without a gap, characterized in that it comprises a plurality of ducts (7) extending radially in the discoid body (2), opening onto the outside wall (4) and also passing through said abrasive material, so as to constitute ducts for conveying a cooling and/or lubricating liquid onto the abrasive outer surface of said outside wall (4).
2. A grinding wheel according to claim 1, wherein each of the ducts (7) of said plurality comprises a radial portion extending from a first end (7a) opening into the outside wall (4) of the discoid body and a second, opposed end (7b) opening into an annular recess (8) provided on one (2a) of the opposed faces of said body (2), said recess (8) having a volume such as to receive a predetermined quantity of said liquid suitable for being conveyed in homogenous distribution and by centrifugal action along said ducts (7) until it reaches the abrasive surface of the grinding wheel.
3. A grinding wheel according to claim 1 or 2, wherein said ducts (7) are angularly spaced at a regular pitch in the discoid body (2).
4. A grinding wheel according to any one of the preceding claims, wherein said ducts (7) have a cross-section of circular or elliptical shape.
5. A grinding wheel according to any one of claims 1 to 3, wherein said ducts (7) have a cross-section of quadrilateral polygonal shape.
6. A grinding wheel according to any one of the preceding claims, wherein the abrasive material is disposed in a continuous seat extending circumferentially on the discoid body (2) and opening into the outside wall (4) of said body, said ducts (7) extending in communication with said seat and also passing through the abrasive material provided in said seat.
7. A grinding wheel according to claim 6, wherein the abrasive surface (6a) capable of contact with the workpiece to be subjected to grinding has in axial section a concave curved profile for contact with corresponding convex profiles of workpieces to be subjected to grinding.
8. A grinding wheel according to claim 7, wherein said concave profile of the abrasive surface (6a) is selected for the grinding of convex edges of windows for motor vehicles, wherein said grinding wheel is driven at a high feed speed with respect to said edges.
9. A grinding wheel according to any one of the preceding claims, wherein each of said ducts (7) extends with its respective radial portion as far as a predetermined distance from the main grinding wheel axis, at which it is connected in fluid communication with said recess (8).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT000237A ITPD20080237A1 (en) | 2008-07-31 | 2008-07-31 | MOLA, PARTICULARLY FOR MILLING PROCESSES WITH HIGH SPEED @ ADVANCEMENT |
| PCT/IT2009/000336 WO2010013278A1 (en) | 2008-07-31 | 2009-07-28 | Grinding wheel, particularly for grinding work at a high feed speed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2331290A1 true EP2331290A1 (en) | 2011-06-15 |
Family
ID=40837829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09787808A Withdrawn EP2331290A1 (en) | 2008-07-31 | 2009-07-28 | Grinding wheel, particularly for grinding work at a high feed speed |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20110130081A1 (en) |
| EP (1) | EP2331290A1 (en) |
| IT (1) | ITPD20080237A1 (en) |
| WO (1) | WO2010013278A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1395952B1 (en) * | 2009-09-25 | 2012-11-02 | Adi S P A | ABRASIVE DISC FOR MULTI-DISC WHEEL, PARTICULARLY FOR PROCESSING OF STONE MATERIALS AND RELATED MOLA AND INCLUDING THE WHEEL |
| KR20140121416A (en) * | 2012-01-17 | 2014-10-15 | 구일린 챔피온 유니온 다이아몬드 컴퍼니 리미티드 | Highly efficient cutting and grinding wheel designed to retain its shape |
| CN102658525A (en) * | 2012-05-22 | 2012-09-12 | 河海大学常州校区 | Grinding wheel for grinding heat exchange and heat exchange method thereof |
| CN108406620A (en) * | 2018-05-03 | 2018-08-17 | 西安增材制造国家研究院有限公司 | With spray lubricating fluid grinding wheel in modularization abrasive grain and including the grinding attachment of the grinding wheel |
| CN109093534B (en) * | 2018-09-11 | 2023-12-08 | 桂林创源金刚石有限公司 | Pneumatic feeding cup-shaped grinding wheel, parallel grinding wheel and grinding disc |
| IT202100015614A1 (en) * | 2021-06-15 | 2022-12-15 | Diamant Di Nunziata Andrea E C S A S | DIAMOND WHEEL SUITABLE FOR GRINDING AND ABRASION OF SOLID LAYERED MATERIALS |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3282263A (en) * | 1963-07-29 | 1966-11-01 | Christensen Diamond Prod Co | Face discharge cutting blades |
| US3830020A (en) * | 1969-10-22 | 1974-08-20 | S Gomi | Grinding diamond wheel, and method of making same |
| US3777443A (en) * | 1970-04-15 | 1973-12-11 | M Shaw | Segmented griding wheel |
| US5423717A (en) * | 1993-10-04 | 1995-06-13 | Ford Motor Company | Grinding wheel assembly |
| US5993297A (en) * | 1994-09-06 | 1999-11-30 | Makino Inc. | Superabrasive grinding wheel with integral coolant passage |
| JP3620679B2 (en) * | 1996-08-27 | 2005-02-16 | 信越半導体株式会社 | Chamfering device and chamfering method for wafer with loose abrasive grains |
| FR2752762B1 (en) * | 1996-08-29 | 1998-10-02 | Snecma | GRINDING WHEEL WITH BUILT-IN WATERING |
| DE69826324T3 (en) * | 1998-02-06 | 2008-07-17 | Minnesota Mining And Mfg. Co., St. Paul | GRINDING WHEEL WITH SHEARED GRINDING SURFACES |
| WO2005084889A1 (en) * | 2004-03-10 | 2005-09-15 | Cristales Instillables De Mexico, S.A. De C.V. | Device for polishing the edge of a glass sheet |
-
2008
- 2008-07-31 IT IT000237A patent/ITPD20080237A1/en unknown
-
2009
- 2009-07-28 EP EP09787808A patent/EP2331290A1/en not_active Withdrawn
- 2009-07-28 WO PCT/IT2009/000336 patent/WO2010013278A1/en active Application Filing
- 2009-07-28 US US13/056,568 patent/US20110130081A1/en not_active Abandoned
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2010013278A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| ITPD20080237A1 (en) | 2010-02-01 |
| US20110130081A1 (en) | 2011-06-02 |
| WO2010013278A1 (en) | 2010-02-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20110130081A1 (en) | Grinding wheel, particularly for grinding work at a high feed speed | |
| US5423717A (en) | Grinding wheel assembly | |
| KR100508224B1 (en) | Pot-shaped grinding wheel | |
| US8616254B2 (en) | Wheel hub with air passage for tire inflation system | |
| US20030139128A1 (en) | Grinding wheel with grinding members | |
| EP3260236B1 (en) | Method and system for feeding a cooling fluid during machining of a workpiece by means of a cup grinding wheel, and cup grinding wheel used therein | |
| US7121928B2 (en) | High smoothness grinding process and apparatus for metal material | |
| US20160176645A1 (en) | Belt band conveyor | |
| US5251408A (en) | Grinding wheel assembly | |
| CN113117870B (en) | Grate plate and supporting element thereof, device at discharge end of grinder and disassembling method of device | |
| JP7179984B2 (en) | Apparatus and method for forming at least one rotating element and method for processing at least one control wheel of the apparatus | |
| US8657650B2 (en) | Grinding wheel dressing system | |
| EP2480376B1 (en) | Multiple disc grinding machine, in particular for processing stone and like materials | |
| JP4103094B2 (en) | Centrifugal projection device | |
| CN203171368U (en) | Grinding device of bearing ring with large draw ratio | |
| US3683566A (en) | Segmented grinding wheel assembly | |
| US8986071B2 (en) | Parts carrier assembly for grinding machine | |
| US20070190915A1 (en) | Cover for guiding a medium in an abrasive disk | |
| EP2644318A1 (en) | Tool assembly | |
| US6206766B1 (en) | Grinding wheel | |
| KR20220026870A (en) | Vibration Barrel Finishing Machine | |
| US20080206050A1 (en) | Dual taper fan-motor assembly | |
| CN211887187U (en) | Turbine structure of grinding machine | |
| CN106078386A (en) | A kind of polishing process of the bearing ring of high length-diameter ratio | |
| KR20080001200U (en) | Abrasive disk for grinder |
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 |
|
| 17P | Request for examination filed |
Effective date: 20110222 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): 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 SE SI SK SM TR |
|
| AX | Request for extension of the european patent |
Extension state: AL BA RS |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| DAX | Request for extension of the european patent (deleted) | ||
| 18D | Application deemed to be withdrawn |
Effective date: 20110531 |