CMM spiral V-groove shape measuring ( thread, screw hole, worm gear ) with rotary table and two flanks contact

摘要

By combining measuring element direction constant control, rotary table radius constant scanning control, and two-flank contact control, V-groove rotary table scanning control is performed to cause the measuring element (24) of the scanning probe (22) to contact always with two flanks for composing the V-groove of the object (W) to be measured, so that it is possible to measure accurately the characteristic values such as pitch deviation and axial runout of side face of male threads set up and fixed on a rotary table (30) or screw hole of the object put on the rotary table, which is placed in a recess of a CMM and possesses a hole for a long work.