초록 ▼

A ball bar gauge for evaluating the performance of coordinate measuring machines is disclosed. The gauge consists of a rigid bar having a magnetic chuck at each end. Each magnetic chuck consists of a permanent magnet and six magnetic pole pieces surrounded by a non-magnetic housing. The bar is used

A ball bar gauge for evaluating the performance of coordinate measuring machines is disclosed. The gauge consists of a rigid bar having a magnetic chuck at each end. Each magnetic chuck consists of a permanent magnet and six magnetic pole pieces surrounded by a non-magnetic housing. The bar is used with two precision tooling balls which are placed in the chucks at each end of the rod. In each chuck three of the pole pieces are slightly longer than the other three pole pieces to provide a stable three-point contact seat for the associated ball.

대표청구항 ▼

A ball bar gauge comprising, a rigid bar, a pair of tooling balls, a magnetic chuck attached to each end of said bar, each of said chucks engaging one of said tooling balls, each of said chucks comprising; a permanent magnet having a plurality of pole faces; means for attaching said magnet to said b

A ball bar gauge comprising, a rigid bar, a pair of tooling balls, a magnetic chuck attached to each end of said bar, each of said chucks engaging one of said tooling balls, each of said chucks comprising; a permanent magnet having a plurality of pole faces; means for attaching said magnet to said bar; and means for rigidly holding said tooling ball proximate to said magnet so that said ball will be attracted and removably held by said magnet.