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:
Sep. 06, 1977
Filed:
Jan. 13, 1976
Sadao Moritomo, Ichikawa, JA;
Seiko Seiki Kabushiki Kaisha, , JA;
Abstract
An apparatus for feed grinding workpieces comprises a workpiece spindle assembly for supporting a workpiece and a grinding wheel spindle assembly for supporting a grinding wheel, the two spindle assemblies being movable relative to each other to enable movement of the workpiece into pressure contact with the grinding wheel. A variable speed drive system rotationally drives the grinding wheel relative to the workpiece at a first predetermined speed of rotation different than the resonant frequency of the grinding wheel spindle assembly to effect feed grinding of the workpiece. Completion of the feed grinding or spark-out is detected after which the rotational speed of the grinding wheel is lowered to a second predetermined speed different than the resonant frequency of the grinding wheel spindle assembly when operating in the spark-out mode. The high speed rotation during feed grinding assures good grinding quality and the low speed rotation during spark-out assures good surface finishing. By rotating the grinding wheel spindle assembly at speeds other than its resonant frequencies, damage due to large vibrations of the assembly is avoided.