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:
May. 03, 1983
Filed:
Jul. 16, 1981
Allan R Barlow, Georgetown, MA (US);
William A Hunter, Danvers, MA (US);
General Electric Company, Salem, VA (US);
Abstract
A system and method are disclosed for automatically machining a work piece to precise selectively determined dimensions under computer numerical control. A movable probe is calibrated against position reference surfaces and is then used to calibrate the position of a fixed probe. The latter serves as a position reference for calibrating the cutting edge of one or more cutting tools. All calibrations are performed under closed loop control. Appropriate tool position offsets are automatically determined from deviations between the programmed and the actual probe and tool positions and are entered into numerical control means to modify the programmed machining operation. After machining has been initiated, probing of the work piece occurs at least once before the final cut is taken and the appropriate tool position offsets are determined and entered to assure that the dimensions of the finished surface will conform to the desired selectively determined dimensions. Any dimensional deviations which are shown to exist upon probing of the finished surface, are indicated together with the allowable machining tolerances for each dimension.