LINEAR MOTOR ARMATURE, LINEAR MOTOR, AND TABLE FEED DEVICE USING THE LINEAR MOTOR

摘要

PROBLEM TO BE SOLVED: To provide a linear motor armature that suppresses warpage occurring along the longitudinal direction of an armature core due to a difference in temperature shrinkage rate between a mold resin and the armature core when fixing the whole armature by the mold resin, and also, secures an optimum magnetic air gap between the armature and a magnetic field without an armature mounting plate so as to suppress the occurrence of thrust ripples, and also to provide a linear motor, and a table feed device.;SOLUTION: When fixing the whole armature 2 of a linear motor 1 by a mold resin 6, in order to suppress warpage occurring along the longitudinal direction of an armature core 3 due to a difference in temperature shrinkage rate between the mold resin 6 and the armature core 3, a cut 4 for dividing the armature core is previously formed toward a direction orthogonal to the longitudinal direction of the armature core 3 at least in one part of the bottom part of a winding storage groove 3c. The armature core 3 is bent at a prescribed angle in the direction opposite to the warpage direction of the armature core 3 during mold fixing centering around the cut 4 so as to join and fix the cut 4 by welding.;COPYRIGHT: (C)2010,JPO&INPIT