Method of fabricating a stator structure of built-in motor.

摘要

The stator of a built-in motor must be correctly secured to the spindle head housing of a machine tool. For this purpose, the periphery of a stator core (10) which is a main portion of the stator is partly welded and is held by a mandrel or the like from the inside to grind the outer circumference (14) maintaining precision. After the mandrel and the like are removed, however, the stator core (10) may undergo deformation with the passage of time. To prevent this, a thermosetting adhesive is applied to the surface of the constituent element plates (12) of the stator core (10) to bond them together, or the constituent element plates (12) are provided with a protuberance (22) as the outer circumference (14) is welded to bond them together, or a serration bar (26) is forcibly inserted in a hole (24) of the element plates (12) instead of providing the protuberance (22) to bond them together.