EP0981421A1 - Grinder for grinding metal slitting saw blades - Google Patents
Grinder for grinding metal slitting saw bladesInfo
- Publication number
- EP0981421A1 EP0981421A1 EP98914783A EP98914783A EP0981421A1 EP 0981421 A1 EP0981421 A1 EP 0981421A1 EP 98914783 A EP98914783 A EP 98914783A EP 98914783 A EP98914783 A EP 98914783A EP 0981421 A1 EP0981421 A1 EP 0981421A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- grinding wheel
- wheel according
- receiving bore
- contour
- grinding
- 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
Links
- 239000002184 metal Substances 0.000 title claims abstract description 8
- 238000003754 machining Methods 0.000 claims abstract description 10
- 229910052582 BN Inorganic materials 0.000 abstract description 4
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 4
- 229910003460 diamond Inorganic materials 0.000 abstract description 4
- 239000010432 diamond Substances 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 description 7
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- 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
Definitions
- the invention relates to a grinding wheel for machining metal circular saw blades at higher speeds, such grinding wheels being hard materials, such as Have machining areas containing diamond or cubic boron nitride with which high metal removal rates can be achieved.
- the grinding wheels according to the invention differ from the grinding wheels conventionally used hitherto, in particular in that the base body of the grinding wheel, at least on one side, in the radially outer region of the tool receiving bore, which can be conventional or, as is known from DE 296 08 590, one Contour is present in which at least one centering element can positively engage.
- the grinding wheel and at least one centering element are held on the tool spindle of the grinding machine.
- a commonly used screw connection can be used for this, but there is also the possibility of using hydraulically, pneumatically actuated piston-cylinder units or a spring force, the latter being particularly suitable for automatic operation.
- a circular groove can be machined on one or both sides of the base body of the grinding wheel, into which corresponding webs of the centering element (s) engage in a form-fitting manner and with almost no play when the grinding wheel is attached to the drive spindle of the grinding machine. It is advantageous if the web-like regions of the centering element (s) engaging in the grooves are spherical, at least on their inner diameter, so that there is no full-surface contact with the corresponding surface of the groove and the insertion is thereby facilitated.
- contour (s) Another possibility for the formation of the contour (s) is that a flange-like extension, which is beyond the normal thickness of the base body
- Protrudes grinding wheel is formed, on which there is at least one radially outer contact surface for the centering element (s), on which the centering element (s) can be supported. Fortunately, the contact surface (s) are inclined with respect to the axis of rotation.
- the contour can, however, also be a circular web that, if necessary, can be symmetrically divided into individual segments with openings can.
- the centering element (s) are each supported on the radially outer surface of the web.
- the possible examples for the formation of the contours can be improved to the extent that contact surfaces which are bevelled at least on one side are formed, on which the corresponding contact surfaces of the centering element (s) are supported.
- Bevels have the advantage that, on the one hand, larger contact surfaces are available and, on the other hand, the insertion or fitting of the centering elements when fastening the grinding wheel to the grinding machine is facilitated and any adjustment errors during insertion can be compensated for and consequently the wear on the centering elements and the base body Grinding wheel can be reduced.
- the improvement of the centering for the grinding wheels in question can further be achieved in that the contours in the form of openings or depressions which are formed in or through the base body of the grinding wheel or such recesses or openings are additionally present. At least two openings or depressions symmetrically opposite one another in the radial direction are required in order to to compensate for the centrifugal forces that occur and to avoid undesirable unbalances.
- the depressions or perforations can advantageously be improved if they are designed to widen conically outwards, as is already the case for the inclined formation of certain surface areas of the grooves, flanges or webs, in particular when threading the centering elements be improved.
- the second centering element can be a separate component that can be held non-positively in the direction of the flange of the drive spindle of the grinding machine.
- the grinding wheel is attached to the drive spindle with a screw connection, it is advantageous to connect the screw and the centering element to one another so that handling is simplified. It is particularly advantageous if the connection is carried out so that the rotation of the screw regardless of the movement of the
- Centering element can take place, thus preventing the centering element from rotating.
- the centering element can be part of the piston or of the cylinder, depending on which of the two elements is used to attach the grinding wheel to the drive spindle.
- Rotational speeds which are improved by the improved support of the grinding wheel in the radial direction, which is further supported by the centrifugal force, taking into account that the centrifugal force increases with the square of the speed, a higher torque can also be obtained by the increase in the surfaces connected by frictional connection.
- FIG. 1 shows several options for the formation of a grinding wheel according to the invention
- 2 shows an example of a grinding wheel according to the invention alone
- FIG. 3 shows the example shown in FIG. 2 in the centered, held position.
- FIG. 1 shows several options for contouring that can be used according to the invention.
- contours are shown as webs 2 and 2 'above the axis of rotation A, the web 2 being to the right of the central axis B of the grinding Disc 1 is formed almost symmetrically with a rectangular or square cross-section, which can be produced more cost-effectively, at least when the corresponding base body of a grinding wheel 1 is machined, than for the web 2 ′ shown to the left of the central axis B with at least one beveled or crowned Contact surface for a centering element is the case.
- the radially inner contact surface of the web 2 ' is beveled, but there is also the possibility of making the radially outer contact surface of this web or both of the contact surfaces beveled or spherical.
- recesses Openings or perforations are formed in the base body of the grinding wheel, in which correspondingly shaped areas of the centering elements could engage.
- FIG. 1 further shows various options, the design, the processing areas 5 and 5 'of a grinding wheel according to the invention which contain the hard materials cubic boron nitride or diamond.
- FIG. 1 Another example of the grinding wheel 1 according to the invention is shown in FIG.
- the contour 7 in the area radially to the tool receiving bore 4 is a flange-like extension, on the in turn radially outer edge of which there are contact surfaces 8 for one or two centering elements 6 (not shown); the contact surfaces 8 are at an angle of 15 with respect to the axis of rotation A. ° inclined.
- the tool-receiving bore 4 is partially conically widening in its inner diameter, the cone forming an angle of 90 ° here.
- the cone is advantageously dimensioned in such a way that it extends to at least the central axis B of the grinding wheel base body or projects beyond it and the remaining area of the tool receiving bore 4 is cylindrical.
- the tool receiving bore 4 can, however, also be designed (not shown) in such a way that the conical part is enclosed by two cylindrical parts, the cylindrical part adjoining the larger diameter of the conical part seeing a larger part. inner diameter than the other cylindrical part opposite.
- the centering element 6 can then be constructed accordingly and bear against the cone and the end face of the cylindrical part of the tool receiving bore 4 adjoining the cone.
- the cone can also be formed in a form not shown on both sides of the grinding wheel 1, in which case two correspondingly designed centering elements 6 can be used on both sides.
- FIG. 3 shows the example according to FIG. 2 in a fixed position on a drive spindle of a grinding machine for metal circular saw blades.
- a centering element 6 is connected to the drive shaft of the grinding machine.
- the grinding wheel 1 is held non-positively against the centering element 6 by means of a clamping screw 10, and at the same time the grinding wheel 1 is centered and fixed during fastening.
- FIG. 3 clearly shows how the grinding wheel 1, with its conical inside diameter of the tool mounting bore 4, the support surface 9 and the contact surface 8 of the flange-like contour 7, bears and aligns with the centering element 6 is held.
- the large surface areas ensure reliable guidance even at relatively high speeds.
- relatively high frictional forces are available which reduce the clamping force with the clamping screw 10 or another
- Clamping element must be applied, which leads to the extension of the life of at least the centering elements 6.
- the centering element 6 is drawn in between its outer edge and the conically widening outer diameter, that is to say in the region of the support surface 9 provided on this side of the grinding wheel 9, which is smaller compared to the support surface 9 provided on the other side.
- the inner outer edge of the centering element 6 bears against the contact surface 8 and the drawn-in region bears against the support surface 9.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
Description
Claims
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19719971A DE19719971A1 (en) | 1997-05-13 | 1997-05-13 | Grinding disc for polishing circular metal saw blades |
DE19719971 | 1997-05-13 | ||
DE29715683U | 1997-09-01 | ||
DE29715683U DE29715683U1 (en) | 1997-05-13 | 1997-09-01 | Grinding wheel for processing metal circular saw blades |
PCT/DE1998/000484 WO1998051447A1 (en) | 1997-05-13 | 1998-02-17 | Grinder for grinding metal slitting saw blades |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0981421A1 true EP0981421A1 (en) | 2000-03-01 |
EP0981421B1 EP0981421B1 (en) | 2000-10-18 |
Family
ID=26036510
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98914783A Expired - Lifetime EP0981421B1 (en) | 1997-05-13 | 1998-02-17 | Grinder for grinding metal slitting saw blades |
Country Status (5)
Country | Link |
---|---|
US (1) | US6206766B1 (en) |
EP (1) | EP0981421B1 (en) |
AT (1) | ATE197008T1 (en) |
ES (1) | ES2142298T3 (en) |
WO (1) | WO1998051447A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69935084T2 (en) | 1998-07-31 | 2007-11-15 | Saint-Gobain Abrasives, Inc., Worcester | Rotary dressing roll containing abrasive inserts |
JP2005313310A (en) * | 2004-03-31 | 2005-11-10 | Mitsubishi Materials Corp | Cmp conditioner |
DE102007039367B4 (en) * | 2006-09-01 | 2019-12-19 | C. & E. Fein Gmbh | tool attachment |
DE202006013890U1 (en) * | 2006-09-01 | 2006-11-16 | C. & E. Fein Gmbh | Tool for cutting processes comprises a working plate having a fixing region with a fixing opening for fixing to a driveshaft of a drive, especially an oscillating drive |
JP5954119B2 (en) * | 2012-10-31 | 2016-07-20 | 日本精工株式会社 | Grinding wheel centering method in screw grinder and measuring device for centering |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB438854A (en) * | 1935-05-09 | 1935-11-25 | Booth Walters | Improvements in or relating to grinding or abrading machines |
BE416961A (en) * | 1935-08-12 | |||
US3566547A (en) * | 1967-11-28 | 1971-03-02 | Gray Tech Ind Inc | Grinding wheel spindle assembly |
US3571980A (en) * | 1969-06-03 | 1971-03-23 | Cincinnati Milacron Inc | Abrasive structures having a compression-producing reinforcing ring |
DE2044046A1 (en) * | 1970-09-05 | 1972-03-16 | Fortuna Werke Maschf Ag | Safety device for a grinding spindle |
US3800483A (en) * | 1971-01-22 | 1974-04-02 | W Sherman | Method of making grinding wheel mounts |
DE2405048A1 (en) * | 1974-02-02 | 1975-09-25 | Salje Ernst | Gripping chuck for accurate mounting of rotary grinding wheels - has serrated steel plate held to wheel surface by pressure plate |
US4326361A (en) * | 1980-06-27 | 1982-04-27 | Union Carbide Corporation | Adjustable hub mount for circular saw blade |
JPS57171601U (en) * | 1981-04-24 | 1982-10-28 | ||
US4455788A (en) * | 1981-06-17 | 1984-06-26 | Minnesota Mining And Manufacturing Company | Abrasive wheel and drive spindle combination with improved attaching means |
US4729193A (en) * | 1986-12-22 | 1988-03-08 | Eugene Gant | Cutting disk mounting assembly |
JP3244718B2 (en) * | 1991-05-22 | 2002-01-07 | 株式会社マキタ | Device for fixing rotary cutting tools in rotary tools |
DE4129090A1 (en) * | 1991-09-02 | 1993-03-04 | Rueggeberg August Fa | GRINDING WHEEL |
DE29608590U1 (en) * | 1996-05-14 | 1996-07-11 | August Heinr. Schmidt GmbH & Co. KG Maschinenfabrik, 70469 Stuttgart | Grinding wheel for machining circular metal saw blades |
US5895317A (en) * | 1996-12-18 | 1999-04-20 | Norton Company | Wheel hub for longer wheel life |
-
1998
- 1998-02-17 WO PCT/DE1998/000484 patent/WO1998051447A1/en active IP Right Grant
- 1998-02-17 ES ES98914783T patent/ES2142298T3/en not_active Expired - Lifetime
- 1998-02-17 EP EP98914783A patent/EP0981421B1/en not_active Expired - Lifetime
- 1998-02-17 AT AT98914783T patent/ATE197008T1/en not_active IP Right Cessation
- 1998-02-17 US US09/341,219 patent/US6206766B1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9851447A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1998051447A1 (en) | 1998-11-19 |
ES2142298T1 (en) | 2000-04-16 |
ES2142298T3 (en) | 2001-02-01 |
ATE197008T1 (en) | 2000-11-15 |
EP0981421B1 (en) | 2000-10-18 |
US6206766B1 (en) | 2001-03-27 |
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