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Title: Cutting tool form compensation system and method

A compensation system for a computer-controlled machining apparatus having a controller and including a cutting tool and a workpiece holder which are movable relative to one another along a preprogrammed path during a machining operation utilizes a camera and a vision computer for gathering information at a preselected stage of a machining operation relating to the actual shape and size of the cutting edge of the cutting tool and for altering the preprogrammed path in accordance with detected variations between the actual size and shape of the cutting edge and an assumed size and shape of the cutting edge. The camera obtains an image of the cutting tool against a background so that the cutting tool and background possess contrasting light intensities, and the vision computer utilizes the contrasting light intensities of the image to locate points therein which correspond to points along the actual cutting edge. Following a series of computations involving the determining of a tool center from the points identified along the tool edge, the results of the computations are fed to the controller where the preprogrammed path is altered as aforedescribed. 9 figures.
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Issue Date:
OSTI Identifier:
Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States) PTO; EDB-94-045756
Patent Number(s):
US 5255199; A
Application Number:
PPN: US 7-628525
Contract Number:
Resource Relation:
Patent File Date: 14 Dec 1990
Country of Publication:
United States
36 MATERIALS SCIENCE; COMPUTERIZED CONTROL SYSTEMS; DATA ACQUISITION SYSTEMS; CUTTING TOOLS; MATERIALS; CUTTING; DESIGN; PROCESS CONTROL; CONTROL; CONTROL SYSTEMS; MACHINING; ON-LINE CONTROL SYSTEMS; ON-LINE SYSTEMS; TOOLS; 360101* - Metals & Alloys- Preparation & Fabrication; 360201 - Ceramics, Cermets, & Refractories- Preparation & Fabrication; 360601 - Other Materials- Preparation & Manufacture