JPS6289468A - Manufacture of linear pulse motor - Google Patents

Abstract

PURPOSE:To save the number of labors and man-hours in a manufacturing process and enhance mechanical precision, by positioning a stator yoke, a mag net, and a back plate, and by molding them integrally with a resin in a state that they are positioned adequately. CONSTITUTION:On the upper surface of a yoke 10, the permanent magnet 3 of a plane-formed H type is mounted, and on the permanent magnet 3, the same-plane-formed back plate 11 is mounted, and they are positioned by a positioning member. After that, the injecting material of epoxy resin or the like is injected with no-pressure or with pressure into the notched sections of respective members to create joint sections 15, 16, and by the sections 15, 16, the yoke 10, the permanent magnet 3, and the back plate 11 are integrally formed at a stretch.

Description

[Detailed description of the invention] 1-Industrial application field-j The present invention relates to a method for manufacturing a linear pulse motor.

1-Prior Art As is well known, linear pulse motors are built into various devices and are widely used for positioning movable parts. Here, FIG. 2 is a perspective view showing an example of the configuration of a linear pulse motor, and as shown in this figure, the linear pulse motor (J
It is composed of a mover 1 made of mild steel or the like, and a stator 2 made of other components. Next, the structure of the stator 2 will be briefly explained using an exploded perspective view shown in FIG.

First, 4 is a slit plate provided opposite to the lower side of the mover 1, and on the lower side of this slit plate 4 is an X-shaped yoke 6 to which an electromagnetic coil 5.5 is fixed. I-
, , letter-shaped permanent magnets 3 are fixed in sequence. A cross-shaped 7 is formed in the center of the yoke 6, thereby forming four magnetic poles 6a, 6b, 6c, and 6d. In addition, magnetic poles 6 a, 6 b, 6 C, 6 (
Comb-shaped pole teeth 4 a, 4 b, 4 c, and 4 d are formed at the position of the slit plate 4-4- that is directly above I, and the teeth provided on the F surface of the slider 1 shaped movable tooth 1a
They are configured to face each other with an extremely small gap between them. Further, reference numeral 8 denotes a back plate that constitutes a magnetic path of the permanent magnet 3, and is joined to the lower surface of the permanent magnet 3.

According to the configuration described below, the movable tooth 1a and the pole tooth 4a.

41), 4c, and 4d face each other with a small gap, and in this state, when a predetermined pulse-like current is supplied to the coil 5.5, the mover 1 moves over the stator 2 in a step-like manner. Moving.

As can be seen from the above, the mechanical structure of the stator 2 mainly includes the back plate 8, the permanent magnet 3, and the yoke 6.
It consists of three parts.

In the conventional stator manufacturing method, the three parts are joined together using an adhesive.

"Problems to be Solved by the Invention" However, in the conventional manufacturing method of bonding the back plate 8, permanent magnet 343, and yoke 6 with adhesive, it is necessary to remove the adhesive that protrudes from between each component during bonding. This method has the disadvantage that it takes time and effort. In addition, in the conventional manufacturing method, the members to be bonded are pressurized in the vertical direction, which often causes warpage or distortion in the members. Especially in the yoke 6 with grooves 7, distortion is likely to occur, and each magnetic pole A problem occurred in that the directions of 6a, 6b, 6c, and 6d were not aligned in the Lr direction.

Further, in the conventional manufacturing method, including the bonding of the slit plates 4, a total of three bonding steps are required, which is disadvantageous in terms of work efficiency.

This invention was made in view of two consecutive circumstances, and it is a linear pulse smoke that can save labor and man-hours in the manufacturing process, and also improve machine accuracy by increasing the flatness of the yoke. The purpose is to provide a manufacturing method.

``Means for Solving the Problems j This invention, in order to solve the problems described in ``--, stator yokes, magnets, and back plates constituting the stator of a linear pulse motor are stacked at predetermined positions, respectively. The yoke, the magnet, and the back plate are molded with resin and integrated in the positioned state using a positioning member.

"Function" The yoke, magnet, and back plate are integrated in one molding process, and there is no need to pressurize them during the mold 3 stage, so no strain is caused by pressure on the yoke or the like.

"Embodiments" Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view showing the main structure of a stator to which an embodiment of the present invention is applied. In FIG. 1, 10 is a yoke, which has the same structure as the yoke 6 shown in FIGS. 2 and 3, except that the notches at the top and bottom of the drawing are U-shaped.

A permanent magnet 3 having an H-shaped planar shape is superimposed on the upper surface of the yoke 6, and a back plate 11 having the same planar shape is superimposed on the permanent magnet 3. In this case, the U-shaped notches of the yoke 6, permanent magnet 3, and back plate 11 are arranged to overlap in the vertical direction.

The overlapping state of each of the two consecutive members is set by mounting each of the above-mentioned members on a positioning member such as a mold. After fixing each part with the positioning member, a casting material such as epoxy resin is injected into the notch part of each member under normal pressure or pressure to form the joint part 15.
．． 16, thereby integrating the yoke 10, the permanent magnet 3, and the back plate 11 at once.

According to the method described above, each member is molded with resin after its position is regulated by the positioning member.
There is no need to press these members together for bonding. Therefore, no pressure strain occurs in the yoke 10, and the magnetic poles 10a, IOb, IQc.

] The directionality of Od does not vary vertically. In other words, the flatness of the yoke in this case is determined by the positioning member (mold)
As a result, extremely high flatness can be achieved.

Note that the joint parts 15 and 16 are formed by injection or transfer molding using a forming material such as epoxy resin instead of the casting material.
A similar effect can be obtained by creating . Also,
The molding method may cover the entire member, or other covering methods may be used as appropriate.

"Effects of the Invention" As explained above, according to the present invention, the stator yoke, the magnet, and the back plate, which constitute the stator of a linear pulse motor, are positioned by the positioning member in a state where they are superimposed on each other at predetermined positions. Furthermore, in the positioned state, the yoke, magnet, and back plate are molded with resin and integrated, which saves time and effort in the manufacturing process, and also improves the flatness of the yoke. It is possible to increase the accuracy of the machine by increasing the degree.

[Brief explanation of drawings]

FIG. 1 is a plan view of essential parts of a stator for explaining an embodiment of the present invention, and FIGS. 2 and 3 are a perspective view and an exploded perspective view showing the configuration of a general linear pulse smoke, respectively. be. 3...Permanent magnet, 10...Yoke, 11
...Back plate, 1.5.16...Joint part. Figure 1 Figure 2

Claims (1)

[Claims] The stator yoke, magnet, and back plate that make up the stator of the linear pulse motor are positioned by a positioning member in a state where they are overlapped at predetermined positions, and further, in the positioned state, the yoke, magnet, and back plate are coated with resin. A method for manufacturing a linear pulse motor characterized by molding and integrating.