The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 17, 1984
Filed:
Aug. 03, 1982
Jack L Odell, II, Snohomish County, WA (US);
Robert F Obear, Snohomish County, WA (US);
Western Gear Machinery Co., Everett, WA (US);
Abstract
A weighing system for a grinding machine which calculates the weight of material removed by the grinding machinery during a grinding procedure. Power signals from a watt meter indicate the power consumed by the motor driving the grinding wheel. The weight of the material removed since the previous calculation is then periodically calculated from the power signals. This incremental weight removal value is then added to the sum of a previously calculated incremental weight removal values to provide an indication of the total weight removed from the workpiece. The calculation also includes a coefficient indicative of the grinding efficiency of the grinding wheel which, in turn, is a function of the density and hardness of the material in the workpiece, the grinding characteristics of the grinding wheel, and the peripheral velocity of the grinding wheel. The peripheral velocity may be calculated by multiplying a signal from a tachometer that is proportional to grinding wheel rotational velocity by the radius of the grinding wheel. The radius of the grinding wheel may be determined by sensing the position of the grinding wheel spindle when the grinding wheel makes contact with the workpiece and comparing this position to the position of a manipulator car carrying the workpiece and the height of the workpiece.