Patent ID: 6067721
Filing Date: 2000-05-30
Classification: B24B

Abstract:
Apparatus for checking the diameter of crankpins rotating with an orbital motion about a geometrical axis, in the course of the machining in a numerical control grinding machine including a worktable, defining said geometrical axis, and a grinding-wheel slide, movable in a transversal direction, witha reference device for cooperating with the crankpin to be checked and defining a checking condition of the apparatus,a measuring device movable with the reference device,a support device for supporting the reference device and the measuring device, the support device havinga support element fixed to the grinding-wheel slide,a first coupling element coupled to the support element so as to rotate about a first axis of rotation parallel to said geometrical axis, anda second coupling element carrying the reference device and coupled to the first coupling element in such a way as to rotate with respect to it about a second axis of rotation parallel to said geometrical axis,a guide device associated with the reference device for guiding the arrangement of the reference device on the crankpin in the course of said orbital motion, anda control device for enabling the apparatus to displace in an automatic way from a rest position to the checking condition, and vice versa,the guide device having a guiding surface adapted to cooperate with the crankpin and guide the engagement of the reference device on the crankpin to be checked in the course of the displacement towards said checking condition.