JPS61210865A - Manufacture of linear stepping motor - Google Patents

Abstract

PURPOSE:To form the dimension of a small space between a mover and a stator, and the parallel degree at high precision, by determining the tooth surface side of the contact surface between the side surface of a roller shaft and the horizontal surface, to be the reference surface, and by polishing and grinding the tooth surface of a core in parallel with the reference surface at a specified distance. CONSTITUTION:A shaft 10 is penetrated into the roller bearing hole 7 of a core layer-built unit 9, and is arranged in a jig 11 so that the tooth surface 6 may be directed upward. The core layer-built unit 9 is supported by two units of shafts 10 at both the ends in the jig 11, and a pressing force F is applied from the bottom section. The surface confronting a space is formed by plane-grinding the tooth surface 6 in parallel with the reference surface 8 of the contact surface (horizontal surface) between the shaft 10 and the jig 11 at a specified dimension, with the grind stone 12 of a plane grinder.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing a tooth surface of a linear stepping motor mover.

[Prior Art] Generally, in a linear stepping motor, as shown in FIG. core 4,5
The core has a tooth surface 6. A bearing hole of 7° for a roller that holds the movable element 1 is formed. By the way, in such a structure, the microscopic space lIg between the mover 1 and the stator 2
is extremely small at 30 to 50 mm, so the parallelism between the O-La ground plane at both ends of the mover 1 and the tooth surface requires high precision.
If the parallelism is poor, the minute gap q between the mover and stator will not be constant, resulting in poor accuracy.

There are disadvantages in that dynamic characteristics such as torque deteriorate, and furthermore, the movable element contacts the stator during operation and becomes inoperable. Therefore, as an example, JP-A-57-55785 shown in FIG.
It has been proposed to control the parallelism by using the surface of the movable element facing the air gap as a reference surface, and by grinding the bearing surface of the roller parallel to it.

[Problems to be Solved by the Invention] As described above, the correction to maintain the parallelism of the microgap between the mover and the stator requires a considerable number of man-hours, which has been an obstacle to mass production.

In view of this, the present invention provides a manufacturing method that can rationally manage the size and parallelism of the microgap between the mover and the stator, taking into account the state of the mover during operation. With the goal.

[Means for Solving the Problems] The manufacturing method of the present invention provides that, in the movable core of a linear stepping motor, the contact surface between the side surface of the roller shaft and the horizontal surface, and the tooth surface side thereof, is used as a reference surface, and the core It is characterized by forming a gap facing surface by polishing and grinding the tooth surfaces of the teeth parallel to each other at a predetermined interval.As shown in FIG. It is composed of a pair of cores 4.5, each of which is formed with a bearing hole 7 for a roller that holds the movable element 1 with a 6° tooth surface. In the method of manufacturing such a mover core, reference numeral 8 is a contact surface between the side surface of the roller shaft at both ends and the horizontal surface, and is a reference surface based on the tooth surface side. Measure the diameter and measure the air gap 9. By polishing and grinding the tooth surface parallel to the reference surface 8, the surface facing the gap is It forms the

[Example] As shown in FIG. 3, a shaft 10 is passed through the roller bearing hole 7 of the core laminate 9, and placed in a jig 11 with its tooth surface 6 facing upward. 〇While supporting the core laminate 9 in the jig with two axes, a pressing force F is applied from below, and the tooth surface 6 is
The surface facing the gap is ground by grinding the surface parallel to the reference surface 8, which is the contact surface (horizontal surface) between the shaft 10 and the jig, with the dimension of Formed.

[Effect of the invention 1] According to the present invention, the size and parallelism of the micro-gap between the mover and the stator can be easily formed with precision, so that the dynamic characteristics such as accuracy and torque are not deteriorated. Or,
There is no possibility that the movable element contacts the stator during operation and becomes inoperable.

In addition, if the core laminate is placed on its back and the tooth surfaces are formed while applying an appropriate pressing force from below as in the example, when the mover is magnetically attracted to the stator side during operation, it will undergo the same deformation. However, since the gap facing surface, which is the most important element, is processed in the final step, the size and parallelism of the micro gap can be formed rationally while taking into account the state of the mover during operation. As described above, the present invention makes it possible to easily control the parallelism of the microgap between the mover and the stator, which greatly contributes to the reduction of man-hours and mass production in manufacturing linear stepping motors. found.

[Brief explanation of drawings]

FIG. 1 is a side view of a linear stepping motor explaining the present invention. FIG. 2 is a side view of a conventional linear stepping motor. FIG. 3 is a front view showing an embodiment of the present invention. 1: Mover 2: Stator 4.5: Core 6: Tooth surface 1.7°/bearing hole 8: Roller shaft bottom reference surface 10
;Axis 11;Jig patent applicant Namiki Precision Jewel Co., Ltd.Drawing Figure 3

Claims (1)

[Claims] In the core of the mover of the linear stepping motor, the tooth surface side that is the contact surface between the side surface of the roller shaft and the horizontal surface is used as a reference surface, and the tooth surfaces of the core are polished and ground in parallel at predetermined intervals. A method for manufacturing a linear stepping motor, characterized in that a gap facing surface is formed by forming a gap facing surface.