JPS58186365A - Manufacture of pole group of linear pulse motor - Google Patents

Abstract

PURPOSE:To facilitate the machining of the pole group of a linear pulse motor and to obtain an accurate interval between teeth by assembling the poles for the motor, then bonding a slit plate made of a magnetic material formed with accurate teeth on the surface of each pole and then bending the end. CONSTITUTION:A slit plate 11 is formed by forming the plate 11 based on punching, or photoetching the periphery 11b and the teeth unit 11a to chemical etching the remaining part with teeth 11a of the prescribed number at the position opposed to the surface of each pole. Coils are engaged on the poles 12a1, 12a2, 12b1, 12b2 of the pole group of a movable element, and the plate 11 is bonded to each pole with adhesive. Then, the side face part 11b of the plate 11 which is projected at the side of the pole is bent in contact with the side face of the pole. In this manner, the teeth of the pole can be readily formed, and the interval between the teeth can be accurately formed.

Description

Detailed Description of the Invention The present invention relates to magnetic poles of a linear pulse motor whose cantering is controlled based on the interrelation between the magnetic flux generated from the excitation of a coil wound around the magnetic poles and the magnetic passage circuit of the stator. It concerns the method of creating groups.

-Fit: 'J near pulse motor is capable of obtaining the amount of movement of the movable element proportional to the number of pulses applied to it. 62 Related to this is the accurate positioning of the head of typewriters, printers, etc., or the NO of machine tools. Suitable for sub-control.

To explain the specific structure of this linear pulse motor according to the principle shown in FIG. 2 and 3 are connected by a permanent magnet 4 at a pitch of 5/4 as shown in the figure, and each magnetic pole 2a, 2b.

3a and 3b are shown in the winding direction (therefore, the coils 5, 6
is being carried out.

Then, by applying excitation 4a to the coils 5 and 6 among various methods such as phase excitation, two-phase excitation, and -two-phase excitation, each time the excitation is switched; For example, the tq mover side including the iron cores 2 and 3 is moved by 1/4 pitch.

On the other hand, in general, when this motor is used for positioning, there is a demand for the amount of movement per uppulse to be as small as possible in order to increase the positioning resolution. For this reason, the pitch of each tooth of the scale and slider that constitute the linear pulse motor must be kept as small as possible.

For this reason, the pitch of the teeth on the movable element side, in particular, becomes less accurate due to the fact that multiple magnetic pole bodies are formed separately and then assembled together with permanent magnets. There was a drawback that the number of man-hours required for forming the magnetic pole surface was significantly increased. Namely, each magnetic pole of the magnetic pole body 10 shown in FIG. 2]
It is difficult and laborious work to accurately form Sonobe]Oa+, ]Ob+ for Oa, ]Ob, and even if the tooth part]Oa1. ] Even if Ob1 is formed, the magnetic pole group obtained by assembling the magnetic pole units 10 will maintain an appropriate tooth spacing.

The purpose of this invention is to make the process easier by attaching a slit plate made of magnetic material with precise teeth to the surface of each magnetic pole after assembling magnetic poles for a linear pulse motor, and then bending the ends. The key is to obtain accurate tooth spacing within and between magnetic poles.

Hereinafter, the manufacturing method of this Ino-Akira will be specifically explained based on the drawings.

Figure 3 shows the slit plate according to the present invention, and Figure 4 shows the basic configuration of the iiJ dynamic f magnetic pole group obtained by combining the magnetic pole bodies.
FIG. 5 shows a front view of a magnetic pole group of a linear pulse motor manufactured by the method according to the present invention. First, a slit plate 1 shown in FIG. 3 is provided with a predetermined number of slit plates 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 10, 10, 10, 10, 11, 10, 11, 11, 11, 11, 11, 11, 11a, 11a, 11b, 11a and 11b. The slit plate 11 is formed by punching, or by applying photoresist to the periphery 11k) and the teeth 11a, and then chemically etching the remaining parts, so-called photoetching. Sanru.

Incidentally, since it is desirable that each tooth portion 11a be magnetically cut off, the width of the connection points 11x and lly of each magnetic pole of the slit plate 11 is required to be small in width. In this connection, the formation of the slits in the slit plate is preferably based on etching. With this etching, it is possible to form up to a width of about 005 mm.

On the other hand, the mover magnetic pole group shown in FIG.
are 2 magnets each 1tI! 12a+, 12a2
．． 12b+.

] 2b2 is formed.

Next, each of these magnetic pole bodies 12a, 12b is attached to a contact plate 13a.
, ] 3b, which are integrally connected at substantially constant intervals. However, the back surfaces of the magnetic pole bodies] 2 to 12b are connected by permanent magnets (not shown).

Now, each pole 1 of the mover magnetic pole group shown in FIG.
2a+, ] 2a2. ]2b1.12b2 coils 12c1, 12c2°]2c5. ]2c4 respectively, and the serial number aL41j]2at.

The slit plate 11 is opposed to each magnetic pole surface of 12a2, 12b1, and 12b2. At this time, the teeth 1]a for each magnetic pole are arranged in the direction perpendicular to the direction of movement of each magnetic pole surface as a linear pulse motor mover (in the example, three teeth are arranged for each magnetic pole). ) so that their longitudinal directions are parallel to each other. Next, three m parts 11a each.
Each magnetic pole 12a1.12a2.12b1.12b21 is bonded with adhesive.

Next, the slit plate that comes out on the side of each magnetic pole] Side part of 1]
1) by bending it so that it touches the side surface of the magnetic pole.
The magnetic pole group shown in FIG.

In the magnetic pole group for linear pulse smoke produced in the above process, the tooth portions of each magnetic pole are formed so that the width of the connecting portions 11y and lly is extremely narrow, so that the flow of magnetic flux is almost blocked. In addition, in the magnetic pole group for a linear pulse motor manufactured in the above process, several tooth portions 11a are bonded to the surface of each magnetic pole, but these tooth portions are attached to the surface of each magnetic pole after all the magnetic pole basic bodies are assembled. The slit plate shown in Figure 3 (the slit is accurately positioned by etching, etc.) is joined in the correct direction, and the side part of the slit plate is attached to the side of the magnetic pole base body. It is constructed by bending the magnetic poles so that they face each other.Even if there is some error in the relative position of each magnetic pole on the magnetic pole base body, this error is completely compensated for and the m groups on the scale side (not shown) In contrast, the magnetic pole tI is in the state of dedication (state determined at the time of design).
Ks can be faced.

Note that the slits between the key parts of each of the four magnetic pole parts of the slit plate 11 shown in FIG. This is a provision for joining and to facilitate bending to the side bending part of the magnetic pole base body, and does not necessarily need to be formed.In addition, the connecting part between each magnetic pole opposing part of the slit plate is used to facilitate the flow of magnetic flux. Even if one of the portions 11x and lly that significantly restricts the width is omitted to eliminate the width restriction, the substantial effect will not be lost.

As described above, the method for manufacturing a magnetic pole group for a linear pulse motor according to the present invention involves fitting a coil into the magnetic pole base body and connecting the tII portion group facing each magnetic pole and these adjacent tooth portion groups. A slit plate with a large magnetic resistance is formed at the connecting part, and the tooth group of this slit plate is joined to each magnetic pole of the magnetic pole base body, and both ends of the slit plate in the slit direction are connected to the a-pole side surface. The process consists of bending it so that it faces the .

Based on this manufacturing method, the number of man-hours required to form the magnetic pole teeth of a linear pulse motor is reduced, and compared to the conventional method, which required skill and labor to form the magnetic pole teeth with high precision. It has ambiguous features such as there is no room to reconsider the placement error of the teeth.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the basic structure of a linear pulse motor, Fig. 2 is a perspective view showing the structure of a conventional magnetic pole body, Fig. 5 is a plan view of a slit plate that forms the gist of this invention, and Fig. 4 is a basic magnetic pole body. FIG. 5 is a front view of a magnetic pole group of a linear pulse motor obtained by the method according to the present invention. ]2a1~]2a4---Magnetic pole 116.9 Slit plate 11a...teeth part ]lb...Slit plate side part 11X, lly...part with high magnetic resistance Applicant Kamitsuna Kamiki Co., Ltd. representative People Patent Attorney Haruya Kizumi

Claims (1)

[Claims] 1. A pair of coils is fitted into each magnetic pole, and a tooth group is formed in the part facing the a-pole surface of each magnetic pole, and there are parts that connect adjacent tooth groups only on both sides, A slit plate is formed in at least one of the connecting parts to provide a magnetic resistance, and the tooth part of the slit plate is joined to the magnetic pole surface of each a-pole. Side part W
A method for manufacturing a magnetic pole group for a linear pulse motor, characterized in that 11 magnetic pole groups are bent so as to face each other.