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US 4,475,320 AGranted
Method for regrinding step drills
AssigneeThe Boeing Company
InventorFrank R. Webster
Life of this patent
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Abstract
A drill bit pointer machine includes a laser micrometer for measuring the pilot diameter and transmitting the data to a microprocessor through a digital readout. The microprocessor is programmed to manipulate the data and define the operation of a stepper motor which produces the required motion necessary for adjusting the machine workhead stop for utilization in the subsequently performed semi-automatic grinding cycle.
Claims1
In combination in a method for regrinding step drills, the steps including:
- positioning a step drill in a fixture associated with a laser optical microscope and switching to an ON condition a switch for indicating a diameter measuring process;
- rotating said step drill through 360.degree. revolution and switching to an OFF condition said switch for initiating a measuring process;
- removing said step drill from said fixture associated with a laser optical microscope;
- and, then
- positioning said step drill in a workhead for activating a grinder
- adjusting a workshead stop in response to said diameter measuring to control said regrinding of said step drill.
3 more elements
Dependencies are inferred from the claim text.