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Title: Method for grinding precision components

Abstract

A method for precision cylindrical grinding of hard brittle materials, such as ceramics or glass and composites comprising ceramics or glass, provides material removal rates as high as 19-380 cm.sup.3 /min/cm. The abrasive tools used in the method comprise a strong, light weight wheel core bonded to a continuous rim of abrasive segments containing superabrasive grain in a dense metal bond matrix.

Inventors:
 [1];  [2];  [1];  [3]
  1. (Holden, MA)
  2. (Westboro, MA)
  3. (Acton, MA)
Publication Date:
Research Org.:
LOCKHEED MARTIN ENRGY SYST INC
OSTI Identifier:
872832
Patent Number(s):
US 6019668
Assignee:
Norton Company (Worcester, MA) ORNL
DOE Contract Number:
AC05-84OR21400
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; grinding; precision; components; cylindrical; hard; brittle; materials; ceramics; glass; composites; comprising; provides; material; removal; rates; 19-380; cm; abrasive; tools; comprise; strong; light; weight; wheel; core; bonded; continuous; rim; segments; containing; superabrasive; grain; dense; metal; bond; matrix; brittle materials; light weight; precision components; method comprise; metal bond; composites comprising; removal rates; removal rate; comprising ceramic; abrasive grain; material removal; /451/

Citation Formats

Ramanath, Srinivasan, Kuo, Shih Yee, Williston, William H., and Buljan, Sergej-Tomislav. Method for grinding precision components. United States: N. p., 2000. Web.
Ramanath, Srinivasan, Kuo, Shih Yee, Williston, William H., & Buljan, Sergej-Tomislav. Method for grinding precision components. United States.
Ramanath, Srinivasan, Kuo, Shih Yee, Williston, William H., and Buljan, Sergej-Tomislav. Sat . "Method for grinding precision components". United States. doi:. https://www.osti.gov/servlets/purl/872832.
@article{osti_872832,
title = {Method for grinding precision components},
author = {Ramanath, Srinivasan and Kuo, Shih Yee and Williston, William H. and Buljan, Sergej-Tomislav},
abstractNote = {A method for precision cylindrical grinding of hard brittle materials, such as ceramics or glass and composites comprising ceramics or glass, provides material removal rates as high as 19-380 cm.sup.3 /min/cm. The abrasive tools used in the method comprise a strong, light weight wheel core bonded to a continuous rim of abrasive segments containing superabrasive grain in a dense metal bond matrix.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 2000},
month = {Sat Jan 01 00:00:00 EST 2000}
}

Patent:

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  • A method for precision cylindrical grinding of hard brittle materials, such as ceramics or glass and composites comprising ceramics or glass, provides material removal rates as high as 19--380 cm{sup 3}/min/cm. The abrasive tools used in the method comprise a strong, light weight wheel core bonded to a continuous rim of abrasive segments containing superabrasive grain in a dense metal bond matrix.
  • A reusable grinding tool consisting of a replaceable single layer of abrasive particles intimately bonded to a precisely configured tool substrate, and a process for manufacturing the grinding tool are disclosed. The tool substrate may be ceramic or metal and the abrasive particles are preferably diamond, but may be cubic boron nitride. The manufacturing process involves: coating a configured tool substrate with layers of metals, such as titanium, copper and titanium, by physical vapor deposition (PVD); applying the abrasive particles to the coated surface by a slurry technique; and brazing the abrasive particles to the tool substrate by alloying themore » metal layers. The precision control of the composition and thickness of the metal layers enables the bonding of a single layer or several layers of micron size abrasive particles to the tool surface. By the incorporation of an easily dissolved metal layer in the composition such allows the removal and replacement of the abrasive particles, thereby providing a process for replenishing a precisely machined grinding tool with fine abrasive particles, thus greatly reducing costs as compared to replacing expensive grinding tools. 11 figs.« less
  • A reusable grinding tool consisting of a replaceable single layer of abrasive particles intimately bonded to a precisely configured tool substrate, and a process for manufacturing the grinding tool. The tool substrate may be ceramic or metal and the abrasive particles are preferably diamond, but may be cubic boron nitride. The manufacturing process involves: coating a configured tool substrate with layers of metals, such as titanium, copper and titanium, by physical vapor deposition (PVD); applying the abrasive particles to the coated surface by a slurry technique; and brazing the abrasive particles to the tool substrate by alloying the metal layers.more » The precision control of the composition and thickness of the metal layers enables the bonding of a single layer or several layers of micron size abrasive particles to the tool surface. By the incorporation of an easily dissolved metal layer in the composition such allows the removal and replacement of the abrasive particles, thereby providing a process for replenishing a precisely machined grinding tool with fine abrasive particles, thus greatly reducing costs as compared to replacing expensive grinding tools.« less
  • A method is disclosed for improving the utilization of the heat energy produced in a wood grinding process, wherein wood is ground in a grinding space under a pressure exceeding atmospheric pressure, and warm shower water is sprayed into the grinding space. The groundwood pulp is fed from the grinding space into a steam separator, wherein the heat energy contained in the groundwood pulp is released in the form of steam, and replacement water is brought into the process for the compensation of shower water losses. The steam separator is kept pressurized in order to recover the steam released frommore » the groundwood pulp under a greater pressure and at a higher temperature than in an atmospheric steam separator. The water addition to the recovered shower water is warmed up by means of the pulp suspension discharged from the steam separator, whereby the pressure of the steam is decreased from the pressure of the pulp suspension entering the steam separator only so much as is required for heating the replacement water to a temperature which will bring the shower water to the desired temperature after the replacement water has been mixed with said recovered shower water.« less
  • An apparatus and method for the safe preparation of pulverized coal comprises the steps of mixing coal with an inert gas in a pulverizing mill, separating dry coal dust from an exhaust gas bearing a residue of coal dust in a separator, mixing the exhaust gas with additional inert gas and filtering the coal dust from the gas mixture in a filter.