Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1979-11-08
1981-10-20
Whitehead, Harold D.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
125 11CD, B24B 5300
Patent
active
042953014
ABSTRACT:
An apparatus senses the extent of actual wear of a grinding wheel at an area where the wear will be the greatest during the grinding of a workpiece. The grinding wheel is dressed by removing material from the grinding wheel to an extent which is a function of the extent of sensed wear at the location where the wear is the greatest. The apparatus includes a probe member which is movable toward the circular working surface or side of the grinding wheel from a retracted position and a detector assembly which detects when the probe member initially engages the circular side of the grinding wheel. In some embodiments of the invention, the probe member is moved toward the grinding wheel in incremental steps with sufficient time between the steps to enable the grinding wheel to rotate through slightly more than one complete revolution. In one embodiment of the invention the detector assembly includes a mass which is connected with a probe member. Upon initial engagement of the probe member with the circular side of the grinding wheel, relative acceleration occurs between the mass and probe member. In another embodiment of the invention the detector assembly includes a load cell which detects the occurrence of deflection upon initial engagement of the probe member with the grinding wheel. In still another embodiment of the invention, the probe member is moved with a wheel dressing tool to detect when a wheel dressing operation has been completed. After a wheel dressing operation has been completed the rotational speed of the grinding wheel is increased to maintain a desired surface speed even though the diameter of the grinding wheel has decreased.
REFERENCES:
patent: 2746214 (1956-05-01), Alvord
patent: 2986853 (1961-06-01), Behlen
patent: 3500811 (1970-03-01), Perkins
patent: 3560826 (1971-02-01), Lonaberger
patent: 3590799 (1971-07-01), Gluchowicz
patent: 3667165 (1972-06-01), McDowell
patent: 3691698 (1972-09-01), Schaller
Barth Charles F.
Blake David E.
Stelson Thomas S.
TRW Inc.
Whitehead Harold D.
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