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Title: Coordinate measuring machine test standard apparatus and method

A coordinate measuring machine test standard apparatus and method are disclosed which includes a rotary spindle having an upper phase plate and an axis of rotation, a kinematic ball mount attached to the phase plate concentric with the axis of rotation of the phase plate, a groove mounted at the circumference of the phase plate, and an arm assembly which rests in the groove. The arm assembly has a small sphere at one end and a large sphere at the other end. The small sphere may be a coordinate measuring machine probe tip and may have variable diameters. The large sphere is secured in the kinematic ball mount and the arm is held in the groove. The kinematic ball mount includes at least three mounting spheres and the groove is an angular locating groove including at least two locking spheres. The arm may have a hollow inner core and an outer layer. The rotary spindle may be a ratio reducer. The device is used to evaluate the measuring performance of a coordinate measuring machine for periodic recertification, including 2 and 3 dimensional accuracy, squareness, straightness, and angular accuracy. 5 figs.
Inventors:
Issue Date:
OSTI Identifier:
7242349
Assignee:
Dept. of Energy, Washington, DC (United States) RFFO; EDB-94-132583
Patent Number(s):
US 5341574; A
Application Number:
PPN: US 8-083229
Contract Number:
AC04-90DP62349
Resource Relation:
Patent File Date: 29 Jun 1993
Research Org:
EG&G Rocky Flats, Inc.; Rocky Flats Environmental Technology Site (RFP), Golden, CO
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; EQUIPMENT; STANDARDS; ACCURACY; CERTIFICATION; EVALUATION; MATERIALS HANDLING EQUIPMENT; MEASURING METHODS; PERFORMANCE; TESTING; 420500* - Engineering- Materials Testing