JP3391833B2 - Manufacturing method of polarized electromagnet device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a polarized electromagnet device having a permanent electromagnet. [0002] FIG. 5 shows a polar electromagnet device of this kind in the prior, (A) is its perspective view, (B) is between both side pieces of the iron core of the same, the permanent magnet It is an exploded perspective view in the stage before fitting and inserting both ends. Referring to the drawing, the U-shaped iron core b on which the coil a is mounted is shown.
A permanent magnet d is fitted between both side pieces c and c ', and the coil a and the permanent magnet d are bonded and fixed using an adhesive e. [0003] In such a conventional polarized electromagnet apparatus, when the space between the two pieces c and c 'of the iron core b is narrow, the permanent magnet between the two pieces c and c' is permanent. It becomes difficult to insert and insert the magnet d, and both ends of the permanent magnet d
If the gap formed between the side pieces c and c 'is large, the magnetic resistance is increased and the magnetic efficiency is deteriorated. If the gap is large, the operating characteristics are varied. Moreover, the coil a and the permanent magnet d are bonded and fixed with the adhesive e. However, since the coil a, the iron core b, and the permanent magnet d have different expansion coefficients, the coil a and the permanent magnet d cause thermal expansion when the coil a is energized. As a result, the relative positional relationship changes, and there is a problem that accurate operation characteristics cannot be obtained. The manufacturing method of the polarized electromagnet device of the present invention has been made in view of the above-mentioned problems, and stabilizes the operation characteristics of the electromagnet device, and operates even if the temperature changes due to energization of the coil. Its purpose is to minimize the change of the data. In order to achieve the above object, a method for manufacturing a polarized electromagnet apparatus according to the present invention is a method for manufacturing a U-shaped iron core.
With both side pieces spread outward, fit both ends of the permanent magnet
Insert both ends of the iron core inward in this inserted state.
Position, and reduce the number of permanent magnets in this position.
Positioning points located at least at both ends on one diagonal line
Laser welding at both ends of the permanent magnet
It is characterized by being fixed in between. According to the method of manufacturing a polarized electromagnet device of the present invention, a U-shape is used.
With both sides of the iron core spread outward,
Insert both ends and insert.
Position the piece by narrowing it inward, and in this positioning state
At least one diagonal end of the magnet
Laser welding at specified locations, iron core at both ends of permanent magnet
Since it is fixed between both side pieces of, the precise positional relationship between the coil, iron core, permanent magnet and active element can be maintained ,
A polarized electromagnet device that minimizes variations in operating characteristics
Can be obtained. An embodiment of the present invention will be specifically described with reference to the drawings. FIG. 1 is an external perspective view of a polarized electromagnet device obtained by the manufacturing method of the present invention. In the figure, 1 is a coil,
2 is a U-shaped iron core, and 3, 3 'are both sides of the U-shaped iron core 2.
Pieces, 4 permanent magnet, five armature 6 is armature fulcrum on the permanent magnet 4. [0008] Figure 2 between both sides pieces 3,3 of the core 2 'shows an exploded perspective view at a stage before inserting fitting both ends of the permanent magnet 4, each side piece 3 of the opposite ends of the permanent magnet 4 core 2 , 3 'After positioned fitting inserted between, at that position, both sides piece 3 of the core 2 at both ends of the permanent magnet 4,
It is fixed between 3 '. FIG. 3 shows such a fixed state. FIG. 3 (A) shows two positions r, r at the two diagonal ends of the permanent magnet 4 on the two pieces 3, 3 'of the iron core 2 by laser welding. FIG. 4B is a perspective view of the external appearance of the fixed member, and FIG.
r, r, both side pieces 3,
It is an external appearance perspective view of what was fixed to 3 '. [0009] Figure 4 between the two sides pieces 3,3 of the core 2 ', for the purpose of describing fitting manner to facilitate insertion fitting both ends of the permanent magnet 4, (A) on both sides piece of the iron core 2 Front view showing a state where 3, 3 'is slightly expanded outward,
(B) narrows the space between both side pieces 3 and 3 'from the state of (A) inward (from a position indicated by a dotted line to a position indicated by a solid line in the figure) by using, for example, a jig, so that both ends of the permanent magnet 4 are formed. To the core 2
FIG. 5 is a front view showing a state in which the positioning is performed by being inserted between the side pieces 3 and 3 ′. Then, at the two points r, r at both ends on the diagonal line of the permanent magnet 4 or at the four points r, r, r, r at the positions where both ends of the permanent magnet 4 are positioned, both side pieces 3 of the iron core 2 by laser welding. , 3 '. As described above, both sides of the U-shaped iron core 2 are used.
Since both ends of the permanent magnet 4 are fixed between the side pieces 3 and 3 ', the relative positional relationship between the iron core 2 and the permanent magnet 4 does not change, and therefore, even if the temperature changes, the positional relationship between the two. Is stable. When the relative positional relationship between the iron core 2 and the permanent magnet 4 is stable, the distance between the armature 5 determined by the position of the upper surface of the permanent magnet 4 and the armature surfaces of the side pieces 3 and 3 ′ of the iron core 2 is determined. The relative positional relationship is stabilized, and the operation characteristics are stabilized. [0011] During either side pieces 3,3 of the core 2 ', positioned by inserting fitting both ends of the permanent magnet 4 in its positioning position, both sides piece 3 of the core 2 at both ends of the permanent magnet 4 by laser welding, Fixing between 3 'is iron core 2,
The positional relationship between the permanent magnet 4 and the armature 5 can be maintained with high accuracy, and variations in mechanical or operational characteristics are minimized. The method for manufacturing a polarized electromagnet device according to the present invention is as follows.
In the manufacturing method, both sides of the U-shaped iron core were spread outward
In this state, insert the permanent magnet into both ends and insert it.
In this state, narrow both sides of the iron core inward and position it.
At least one diagonal of the permanent magnet
Laser welding is performed at the positioning points at both ends,
Since both ends of the magnet are fixed between the two sides of the iron core,
A precise positional relationship between the
Can hold, without changing the relative positional relationship between the iron core and the permanent magnet, the positional relationship between them becomes a stable state with respect to temperature change, the upper surface of the the permanent magnets
The relative position between the armature determined by the position and the armature surface of the iron core
A polarized electromagnet device with stable positioning and stable operating characteristics
There is an effect that it can be obtained. [0013] between both sides piece of the iron core, in the inserted position locations fitted at both ends of the permanent magnet, by laser welding, to fix both ends of the permanent magnets between either side piece of the iron core is the core, permanent magnets and armature The polarized electromagnet device has a feature that the positional relationship between the components can be maintained with high accuracy, and that there is no variation in mechanical and operating characteristics as a polarized electromagnet device.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external perspective view of a polarized electromagnet device of the present invention. [2] between the two sides pieces of the iron core, exploded perspective view of the prior step of inserting fitting both ends of the permanent magnet. FIG. 3A is a perspective view showing the appearance of a permanent magnet fixed at two points on both sides on a diagonal line of the permanent magnet to both side pieces of the iron core by laser welding, and FIG. 3B is a perspective view showing four points on both ends of the permanent magnet. FIG. 1 is an external perspective view of a structure fixed to both side pieces of an iron core by laser welding. [4] (A) is a front view showing a state in which spread slightly outward on both sides pieces of the iron core, (B) is narrowed between the two sides piece <br/> inwardly from the state of the (A) a front view showing a state where the positioning and fixing the opposite ends of the permanent magnets between either side piece of the iron core. [5] (A) an external perspective view of a polar electromagnet device of this kind in the prior art, (B) is between both side pieces of the iron core of the same, exploded perspective view of the prior step of inserting fitting both ends of the permanent magnet. [Description of Signs] 1 Coil 2 Iron core 3, both side pieces of 3 ′ iron core 4 Permanent magnet r Fixed point by laser welding

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Atsushi Nakahata 1048 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Works, Ltd. References JP-A-2-170508 (JP, A) JP-A 4-55106 (JP, U) JP-A 54-96857 (JP, U) JP-A 54-64244 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) H01F 7/04

Claims (1)

(57) [Claims] [Claim 1] Both sides of a U-shaped iron core are extended outward.
In this state, insert the permanent magnet into both ends and insert it.
In this state, narrow both sides of the iron core inward and position it.
At least one diagonal of the permanent magnet in the positioning state
Laser welding is performed at the positioning points at both ends,
The feature is that both ends of the magnet are fixed between both sides of the iron core.
Of manufacturing a polarized electromagnet device.