Optics: measuring and testing – By configuration comparison – With photosensitive film or plate
Patent
1986-06-25
1991-06-25
Church, Craig E.
Optics: measuring and testing
By configuration comparison
With photosensitive film or plate
356387, G01B 1110
Patent
active
050261657
ABSTRACT:
A machine for measuring the diameter of both step and standard refurbished twist drills using a laser micrometer is disclosed. The drill (23) to be measured is inserted, cutting end down, in a scroll chuck (21) until the tip of the drill impinges on a stop plate (209) mounted on the end of the arm (207) of a drill stop solenoid (205). A hysteresis brake (169) coupled to the scroll chuck restricts rotation of some chuck elements as other chuck elements are rotated to close the chuck jaws ( b 107). After the drill (23) is grasped by the jaws (107), the hysteresis brake drag is overcome and the drill (23) is rotated by the chuck while the laser beam (187) of a laser micrometer scans a section of the drill (23) to determine the diameter of the drill. After several scans, the scroll chuck (21) is raised, resulting in a different section of the drill (23) being measured by the laser micrometer. If the drill is a step drill (23 ), it is raised again. When the pilot section of the drill lies in the scan path of the laser micrometer another measurement is made. The information developed by the laser micrometer is used by a laser processor (243) to determine the acceptability of the drill.
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Church Craig E.
The Boeing Company
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