US3310916A - Composite abrasive grindstones - Google Patents
Composite abrasive grindstones Download PDFInfo
- Publication number
- US3310916A US3310916A US391421A US39142164A US3310916A US 3310916 A US3310916 A US 3310916A US 391421 A US391421 A US 391421A US 39142164 A US39142164 A US 39142164A US 3310916 A US3310916 A US 3310916A
- Authority
- US
- United States
- Prior art keywords
- grindstone
- sectors
- members
- axial
- grindstones
- 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.)
- Expired - Lifetime
Links
Images
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
- B24D5/16—Bushings; Mountings
-
- 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
- B24D5/06—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental
Definitions
- Anchoring the sectors to a reinforced concrete core also has disadvantages.
- the concrete forming the core may crack and the anchor pins work loose, or heat variations occurring during operation may lead to differential expansion between steel pins and the ceramic materials used for the grindstone, with the result that sepa rations occur between the central body and the sectors and lead to vibrations, cracks, and breakages.
- the object of this invention is to provide an improved composite ceramic grindstone.
- a prestressed radial or circular metal framework directly retains the grindstone-forming sectors and can withstand the centrifugal and tangential forces arising during operation and is resilient enough to compensate for stresses produced by dimensional variations caused by heat.
- the central framing can be in the form of a hollow cylinder to which the inward ends of the radial bracing members are secured and which acts as a support member for the sectors.
- FIGS. 1, 2, 3 and 4 show four variants of sectors, in elevation looking at their operative surfaces
- FIG. 9 is half of a longitudinal section, on an axial plane, of a grindstone
- FIG. 10 is a partial cross-section corresponding to FIG. 9;
- FIG. 12 is a half cross-section, on two different planes, corresponding to FIG. 11.
- All the sectors shown in FIGS. 1 to 9 have an external working surface which is part of a cylinder, and are formed by elongated ceramic members having end walls 1 and side walls 2, the side walls 2 having a waisted part 3 located medially between the ends 1 to provide the overlapping bonding shown in FIGS. 5 and 6 to provide a grindstone having a cylindrical working surface.
- the side walls 2 are formed by planar parts 7 which converge at 8 to provide the waist 3.
- the walls 2, at their ends adjacent the end walls 1 and at the waist 3, are rounded as at 9 (FIG. 2) to give a substantially sinusoidal development repeated around the grindstone periphery when the sectors are assembled as in FIG. 5.
- end walls also are sinusoidal, as at 10, whilst in the embodiment shown in FIG. 10 the two end walls have, respectively, complementary recesses and projections 11.
- FIGS. 7 and 8 A practical form of sector is shown in FIGS. 7 and 8. As will be apparent, the sectors are formed with transverse passages 12 so located that the passages in laterally adjacent sectors are aligned as shown in FIGS. 9 and 11. The ends of the passages 12, at the side walls 2, are enlarged as at 13.
- the sectors are arranged as a tubular group and are secured together by means of longitudinal members 14 which extend through the aligned passages 12 in the sectors and which are secured at the axial ends of the grindstone by means of nuts 15 and 16.
- the members 14 can be replaced by any other means providing axial compression.
- This rigid assembly which may or may not be pre- '3 tensioned, is embedded into a mass 21, which may be concrete, and which gives the grindstone the required weight and the means for assembling the same in the mechanism where the grindstone is to be used.
- the sector-mountin g means takes the form of a metal cylinder 22 to which the longitudinal members 14 are anchored by means of short stirrup-shaped members 23 and nuts 24- Which 'bear against the inside surface of the cylinder 22.
- the mounting means can be secured to two end plates 26 which are secured by conventional means to a shaft 27.
- the metal cylinder 22 may act as a support means for the sectors.
- said securing means comprises a hollow cylinder to which the inner ends of said connecting members are secured and which acts to support the sectors.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES0298929A ES298929A1 (es) | 1964-04-11 | 1964-04-11 | Perfeccionamientos en la fabricaciën de muelas abrasivas compuestas |
Publications (1)
Publication Number | Publication Date |
---|---|
US3310916A true US3310916A (en) | 1967-03-28 |
Family
ID=8442513
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US391421A Expired - Lifetime US3310916A (en) | 1964-04-11 | 1964-08-24 | Composite abrasive grindstones |
Country Status (7)
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3461754A (en) * | 1966-12-07 | 1969-08-19 | Armstrong Cork Co | Rotary drum for fissuring acoustical material |
US20130217315A1 (en) * | 2012-02-22 | 2013-08-22 | Inland Diamond Products Company | Segmented profiled wheel and method for making same |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1507569B1 (de) * | 1966-06-03 | 1970-09-03 | Kloeckner Humboldt Deutz Ag | Verschleissfeste Auskleidung fuer Schwingmuehlen |
GB8914567D0 (en) * | 1989-06-24 | 1989-08-16 | T & N Technology Ltd | Tools for working-non-metallic hard materials |
US5193311A (en) * | 1989-06-24 | 1993-03-16 | T&N Technology Limited | Tools for working non-metallic hard materials |
GB2288557B (en) * | 1994-04-22 | 1997-09-10 | Unicorn Abrasives Ltd | Grinding tool and method of assembly |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB319469A (en) * | 1928-08-22 | 1929-09-26 | Horace Akeroyd | Improvements in or relating to the grinding stones used on wood pulping machines |
US2032484A (en) * | 1935-06-13 | 1936-03-03 | Norton Co | Segmental grinding wheel |
-
1964
- 1964-04-11 ES ES0298929A patent/ES298929A1/es not_active Expired
- 1964-06-05 DE DE19641502643 patent/DE1502643A1/de active Pending
- 1964-07-13 BE BE650467D patent/BE650467A/xx unknown
- 1964-08-03 CH CH1012864A patent/CH420903A/fr unknown
- 1964-08-04 GB GB31327/64A patent/GB1049250A/en not_active Expired
- 1964-08-24 US US391421A patent/US3310916A/en not_active Expired - Lifetime
- 1964-11-19 SE SE13938/64A patent/SE311589B/xx unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB319469A (en) * | 1928-08-22 | 1929-09-26 | Horace Akeroyd | Improvements in or relating to the grinding stones used on wood pulping machines |
US2032484A (en) * | 1935-06-13 | 1936-03-03 | Norton Co | Segmental grinding wheel |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3461754A (en) * | 1966-12-07 | 1969-08-19 | Armstrong Cork Co | Rotary drum for fissuring acoustical material |
US20130217315A1 (en) * | 2012-02-22 | 2013-08-22 | Inland Diamond Products Company | Segmented profiled wheel and method for making same |
US9050706B2 (en) * | 2012-02-22 | 2015-06-09 | Inland Diamond Products Company | Segmented profiled wheel and method for making same |
Also Published As
Publication number | Publication date |
---|---|
DE1502643A1 (de) | 1969-07-03 |
BE650467A (US20100223739A1-20100909-C00025.png) | 1964-11-03 |
ES298929A1 (es) | 1965-01-16 |
SE311589B (US20100223739A1-20100909-C00025.png) | 1969-06-16 |
CH420903A (fr) | 1966-09-15 |
GB1049250A (en) | 1966-11-23 |
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