US3310916A - Composite abrasive grindstones - Google Patents

Composite abrasive grindstones Download PDF

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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
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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
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US391421A
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English (en)
Inventor
Nussbaum-Christmann Guillermo
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Individual
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Individual
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Filing date
Publication date
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Publication of US3310916A publication Critical patent/US3310916A/en
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    • 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)
US391421A 1964-04-11 1964-08-24 Composite abrasive grindstones Expired - Lifetime US3310916A (en)

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)

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US (1) US3310916A (US07709020-20100504-C00041.png)
BE (1) BE650467A (US07709020-20100504-C00041.png)
CH (1) CH420903A (US07709020-20100504-C00041.png)
DE (1) DE1502643A1 (US07709020-20100504-C00041.png)
ES (1) ES298929A1 (US07709020-20100504-C00041.png)
GB (1) GB1049250A (US07709020-20100504-C00041.png)
SE (1) SE311589B (US07709020-20100504-C00041.png)

Cited By (2)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1507569B1 (de) * 1966-06-03 1970-09-03 Kloeckner Humboldt Deutz Ag Verschleissfeste Auskleidung fuer Schwingmuehlen
US5193311A (en) * 1989-06-24 1993-03-16 T&N Technology Limited Tools for working non-metallic hard materials
GB8914567D0 (en) * 1989-06-24 1989-08-16 T & N Technology Ltd 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)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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
CH420903A (fr) 1966-09-15
ES298929A1 (es) 1965-01-16
SE311589B (US07709020-20100504-C00041.png) 1969-06-16
GB1049250A (en) 1966-11-23
BE650467A (US07709020-20100504-C00041.png) 1964-11-03
DE1502643A1 (de) 1969-07-03

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