JPS611258A - Manufacture of yoke of linear pulse motor - Google Patents

Abstract

PURPOSE:To prevent an inconvenience caused by a cutting work from occurring by omitting the cutting work of a coupler provided to hole the positional relationship between pole members. CONSTITUTION:A cross-shaped hole 20a is formed at an iron plate 20 by a punch 36, a cross-shaped coupling member 21a is press-fitted to the hole 20a from a nonmagnetic plate 21 by a punch 37, and the plate 20 is cut by a punch 38. In this case, the plate 21 is pressed by a punch stripper, and the plate 20 is pressed by the lower surface of a middle die 34 by moving the die 34 downward. When an upper die support 35 moves from the bottom dead center upward, and the punches 36, 37, 38 and the plate 21, the plate 20 is fed in the prescribed distance by feed rollers 26a, 26b, and the plate 21 is similarly fed by the feed rollers.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a yoke incorporated in a primary side magnetic flux generating device of a linear pulse motor, specifically a yoke in which a plurality of plate-shaped magnetic pole members are arranged in a plane and connected to each other. The present invention relates to a method of manufacturing a yoke.

[Prior art]

Linear pulse motors can achieve high performance as reciprocating actuators, so they are used in various information terminals and equipment, such as head feeding of various printers and photoelectric reading devices, which require accurate positioning control. However, in recent years, OA terminal equipment has become smaller and thinner, and along with this trend, linear pulse motors themselves have become smaller and thinner. There is a growing demand to do so.

In view of such requests, the applicant has provided Figures 6 to 9.
A linear pulse motor as shown in the figure was developed.

This linear pulse motor has four poles 1a, 112io
, ld, and a secondary scale 2 linearly movably supported on the magnetic flux generating device 1. The magnetic flux generating device 10 includes two excitation coils 3.
By inputting a predetermined pulse signal to a and 3b, either the magnetic flux generator 1 or the secondary scale 2 is stepped by a fixed distance, and the driving principle is the same as the previous one. , As is clear from Figure 9, ■−
Pole 1a, lb, 1a of next side magnetic flux generator 1
, ld should use plate-shaped magnetic pole members 4, 5, 6.7' (r, ■ Each plate-shaped magnetic pole member 4, 5, 6, 7 has a head 4"p 5 IL+ where pole teeth 8 are provided. 6 PL, -
7a and leg portions 4b, 5b, 6b, 7b extending from the head 4a, 5a, 6a, 7a and to which the magnetic frame 9 around which the excitation coils 3a, 3b are fully wound is fixed; ■The magnetic pole members 4, 5, 6.7 are brought close to each other with their respective heads 4a, 5a, 6a, 7FLe in a planar shape,
The legs 4b, 5b, 6 are arranged in a substantially H-shape and face each other.
b, excitation coils 3a, 3b are arranged in the open position of 7b;
■ 8 pole teeth that generate all magnetic flux ζ (Surin at predetermined intervals) 10
The slit plate lO provided with avi7 is inserted into the plate-shaped magnetic pole member 4. 5
．． 6. (1) form the permanent magnet 11 with a predetermined polarity by adhering it to the surface of the magnetic pole 1a,
lb.

, lo, ld plate-shaped magnetic pole members 4, 5°6.
Characteristic configurations such as adhesion to the back surface of 7 are essential, and these essential configurations make it possible to achieve a thinner design.

[Problem that the invention seeks to solve]

By the way, conventionally, when manufacturing the above-described magnetic flux generating device 1, the four magnetic pole members 4,5°6.7 are replaced with four magnetic pole members 4,5°6.7 in advance, as shown in FIG.
．． 6. Each magnetic pole member 4. 5.6. The slit plate 10 forming the pole teeth 8 on the upper surface of the head of the yoke 7 also has slits lOa'(z
It is formed into an integrated structure. These yoke 12 and slit plate 10Fi each have a permanent magnet 1
After bonding 1, the unnecessary connecting portions 10b and 12& were cut off as shown by broken lines in Figure 11 (a), (2). According to such a manufacturing method, the magnetic pole members 4, 5, 6
．． 7. This is because mutual positioning can be easily and reliably performed. However, in the above-mentioned manufacturing method, particularly in the manufacturing method of the yoke 12, there were the following drawbacks.

■ Magnetic pole member 4.5. 6. 7. In order to accurately position each other, the magnetic pole members 4. 5. 6. 7, and these members 4. 5.6.7 A frame-shaped connecting part 12B that connects each other must be provided, but this connecting part 1
2a is cut and becomes unnecessary, resulting in poor material yield.

■Magnetic pole members connected by the connecting member 12a・4.
5. 6. 7 is the 11th magnet after being glued to the permanent magnet 11.
Since each magnetic pole member 4. is cut as shown by the broken line in the drawing, each magnetic pole member 4. 5. An unreasonable load may be applied to the adhesive layer between 6.7 and the permanent magnet 11, and the strength of the adhesive portion may become unstable.

■ Due to the above cutting work, etc., each magnetic pole member has a diameter of 4°5.6
．． After this cutting work, it is necessary to grind the top surface of each magnetic pole member 4, 5, 6.7 because the magnet 7 will be deformed, but since the permanent magnet 11 is bonded to the bottom surface, grinding is not necessary. It is difficult to apply.

■ Not suitable for mass production as assembly requires multiple steps.

[Purpose of the invention]

This invention has been made in view of the above circumstances, and it is possible to completely omit the cutting work of the connecting member provided to maintain the complete positional relationship between the magnetic pole members when assembling the yoke. It is an object of the present invention to provide an entire method for manufacturing a yoke for a linear pulse motor that can prevent inconveniences caused by cutting operations and has a good material yield.

[Structure of the invention]

This invention includes a first step of forming an opening in a predetermined shape in a long magnetic plate that is continuously supplied, and a first step of forming an opening in a predetermined shape in a long magnetic plate that is continuously supplied so as to intersect with the magnetic plate above the magnetic plate. Punching a long non-magnetic plate into the predetermined shape,
a second step of inserting the non-magnetic plate punched into the predetermined shape into an opening of the magnetic plate positioned below the non-magnetic plate; a third step of cutting the magnetic plate into which the plate has been fitted into predetermined dimensions; and a brazing process on the magnetic plate cut into predetermined dimensions in the third step, and then cutting through the non-magnetic plate of the predetermined shape. The present invention is characterized by comprising a fourth step of forming a plurality of mutually connected plate-shaped magnetic pole members.

〔Example〕

FIGS. 1 and 2 are diagrams for explaining an embodiment of the yoke manufacturing method according to the present invention. In Figure 1,
Reference numeral 20 denotes a long iron plate, which is sequentially transferred by a predetermined size P in the direction of the arrow X indicated by the leap.

Reference numeral 21 denotes a long non-magnetic plate (for example, a stainless steel plate), which is sequentially transferred by a predetermined size above the iron plate 20 in the direction of the arrow Y orthogonal to the direction of the arrow X. First, in the first drawing, a cross-shaped opening 20ae is punched out at the center of the width direction of the portion A shown in the figure of the iron plate 20, and a center notch 20b, 20ot is formed. Next, in the second step, the opening 20 is removed from the non-magnetic 1 green plate 21.
A connecting member 21a having substantially the same shape as a is punched out in the direction of arrow Z shown in the figure, and is press-fitted into an opening 20a formed in a portion B of the iron plate 20 shown in the figure. Furthermore, in the third step, the iron plate 20 is cut in the width direction at a portion C shown in the figure. As a result, the opening 20aK connecting member 21& is press-fitted, and a yoke substrate 22/ having a length P is formed. Further, this yoke substrate 22' is sent to the next fourth step, and after the opening 20a and the connecting member 21a are fixed by brazing treatment (brazing),
In b), the entire part shown by the broken line is punched out. As a result, as shown in Fig. m2 (b), the conventional magnetic pole member 4°5.
6.7 (see FIG. 10 and FIG. 11(B)) plate-shaped magnetic pole members 22Fk to 22d have the same shape as the connecting portion ti 21
By a, the parts were connected to each other! - Ri 22 is completed.

Next, after the yoke 22 is ground and finished on both sides, the permanent magnet 11 (see Figures 10 and 11 (see 13)) is glued to the magnetic flux generator 1 (see Figures 6 and 13). (See Figure 9) is sent to the assembly process.

Next, the first to third embodiments of the above-described yoke manufacturing method will be described.
About the press machine used in the process @Figure 3 ~ q5V? Refer to and explain. In these figures, 2
5 is a coil sheet around which an iron plate 20 is wound, and the iron plate 20 of this coil sheet 25 is fed by rollers 26a and 26b.
The IC is clamped and supplied to the upper surface of the rectangular parallelepiped-shaped lower die 29 installed on the lower die base 27 via the spring 28, and is fed in a predetermined size to the upper surface of the lower die 29 in the technical direction of the lower die 29, that is, in the figure. It is transported in the direction of the arrow X shown. 3 degrees is a coil sheet around which a non-magnetic plate 21 is wound, and the non-magnetic plate 21 of this coil sheet 30 is attached to feed rollers 31a,
a rectangular parallelepiped-shaped intermediate die 34 which is held by the lower die base 27 via a support 32 and a spring 33;
It is supplied in predetermined size portions to the upper surface and transferred along the longitudinal direction of the medium 11η dice 34, that is, in the direction indicated by the arrow Y in the figure. In this case, the intermediate die 34 is disposed above the longitudinally central portion of the lower die 29, and is arranged such that its direction is orthogonal to the direction of the direction of the lower die 29, The direction Y in which the non-magnetic plate 21 is transferred is the iron plate 2.
0 is perpendicular to the direction X in which it is transported. In addition, in FIG. 4 and FIG. 5, 35 is moved vertically by a drive mechanism (not shown)! This is an upper mold support part that swells into J, and on the lower surface of this upper mold support part 35 there are cross-shaped bunches 36, 37 for punching and a single-character bunch 38 for cutting +7#.
are sequentially arranged in the longitudinal direction of the lower die 29 and attached by IH cracks, and the bunch stripper 39 having a through hole 39a'e through which the bunch 37 passes is biased downward by a spring 40. , it is supported by the pillar 41 so that it can move up and down automatically. Also, intermediate dice 3
The part located below the bunch 37 of No. 4 and the part located below the bunch 36 of the lower die 29 are M]r.
The f1 hole 34a and the f running hole 29a are formed respectively.

In such a configuration, when the upper mold support part 35 is driven downward by the drive mechanism, the punch 36 performs the first step described above, and the punch 37 performs the second step.
Further, a third step is performed simultaneously by the punch 38. That is, a cross-shaped opening 20a is formed in the iron plate 20 by the punch 36, and the punch 3
7 connects the non-magnetic plate 21 to the cross-shaped connecting member 21a.
is punched out, and this connecting member 21a is inserted into the opening 20.
a, and the iron plate 20 is further cut by the punch 38. At this time, the non-magnetic plate 21 is pressed by the punch stripper 39, and the iron plate 20 is pressed by the intermediate die 3.
4 moves downward, it is pressed by the lower surface of the intermediate die 34. Frozen, lower die 29 is spring 2
8 to prevent a collision when the punch 37 reaches the bottom dead center. Then, the upper mold support part 35 moves upward from the bottom dead center, and each punch 36°, 37.
38 separates from the iron plate 20 and the non-magnetic plate 21, the iron plate 20 moves by a predetermined dimension P (see FIG. 1) to the feed roller 26a.
, 26b, and the non-magnetic plate 21 is also transported by the feeding roller 31a.

31kl to prepare for the next punching.

In the above embodiment, the non-magnetic plates 21 are arranged to intersect at right angles to the transport direction of the iron plate 20, but if they are arranged to intersect at an appropriate angle,
The connecting member 21& can be punched out from the non-magnetic plate 21 without waste.

〔Effect of the invention〕

As explained above, according to the present invention, the first magnetic plate is configured to form an opening in a predetermined shape in a continuously supplied long magnetic plate.
above the magnetic plate, a long non-magnetic plate that is continuously supplied intersecting with the magnetic plate is punched into the predetermined shape, and the non-magnetic plate punched into the predetermined shape is a second step of fitting a plate into an opening of the magnetic plate located below the non-magnetic plate; and cutting the magnetic plate with the non-magnetic plate of a predetermined shape fitted into the opening into predetermined dimensions;
A plurality of plates are connected to each other via the non-magnetic plate having the predetermined shape after performing a brazing treatment on the magnetic plate cut into predetermined dimensions in the step of separating @3 and the third step. Since the method includes the fourth step of forming the shaped magnetic pole member, the following effects can be obtained.

(11) Unlike the conventional method, there is no need to provide a frame-shaped connecting member for maintaining the mutual positional relationship between the magnetic pole members, so compared to the conventional method, the material yield is higher and the material can be saved.

((2) Since each magnetic pole member is firmly connected via a non-magnetic material, the mutual positional relationship of each magnetic pole member can be stably maintained.

(3) All cutting and grinding processing is performed before completely bonding the permanent magnet to the magnetic pole member, making processing easier. No deformation occurs.

b4) Assembly work can be simplified and production costs can be reduced by using a press machine or the like.

[Brief explanation of the drawing]

1, 2 (a) and 2 (b) are perspective views for explaining one embodiment of the yoke manufacturing method according to the present invention, and 3.
The figures are a plan view showing the configuration of a press machine used in performing the first to third steps of the same embodiment, FIG.
Figure FJJ5 is a sectional view taken along the F/-N line and v-v line in Figure 3, Figures m6 to 9 are diagrams showing the configuration of a conventional linear pulse motor, and Figure 6 is a plan view. Figure 7 is a front view, Figure 8 is a partially cutaway right side view, Figure 9 is an exploded perspective view, and Figure 10 is a front view.
Figures 11(2) and 11(B)Fi are an exploded perspective view and a plan view, respectively, for explaining a conventional manufacturing method of the yoke 12. 20...Iron plate (magnetic plate), 20a...
Opening, 21...Nonmagnetic plate, 21a...
・Connecting member, 2z... Yoke board, 22...
...Yoke, 22a to 22 (L...Plate magnetic pole member.

Claims (1)

[Claims] A first step of forming an opening in a predetermined shape in a continuously supplied long magnetic plate, and above the magnetic plate,
A long non-magnetic plate that is continuously supplied so as to intersect with the magnetic plate is punched into the predetermined shape, and the non-magnetic plate punched into the predetermined shape is positioned below the non-magnetic plate. a second step of fitting the non-magnetic plate into the opening of the magnetic plate; a third step of cutting the magnetic plate with the predetermined shape of the non-magnetic plate fitted into the opening into predetermined dimensions; and a fourth step of performing a brazing process on the magnetic plates cut into predetermined dimensions and then forming a plurality of plate-shaped magnetic pole members interconnected via the non-magnetic plates having the predetermined shape. A method for manufacturing the yoke of a featured linear pulse motor.