Patent №
US 5,035,554
Granted
1991-07-30
Filed 1990
Owner
NATIONAL RESEARCH DEVELOPMENT CORPORATION, A BRITISH CORP.
Lab
—
AI components
1
planning
Assignment
Recorded
Dataset
AIPD
2023_r1 edition
Application
07458616
In CNC machining, the radius of the circle described by a tool tip has been set manually using a separate setting machine. The present invention allows such a radius to be set automatically. A rotary datuming touch trigger probe has internal and external cylindrical datum surfaces 40 and 41. Threee piezo-electric crystals 47a, 47b, and 47c are mounted between a mounting member 43 for the cylindrical surfaces and a collar 44 fixed to a machining table 46. The tip of a tool forming part of a boring head is brought into engagement with the surfaces by driving the tool along the U-axis and when engagement occurs it is sensed by the piezo-electric crystals which send a signal to a computer. The procedure is repeated with the tool tip 180.degree. and 270.degree. around the cylindrical surfaces from its original position allowing the computer to determine the radius of the tool tip relative to the axis of the datum surfaces. Other forms of rotary datuming probes are also described.
AI classification
Ownership
NATIONAL RESEARCH DEVELOPMENT CORPORATION, A BRITISH CORP.
assignment · 56600316
Assignors
NICKOLS, FRANCIS M. J.
On an employer assignment, the assignors are typically the inventors.