JPH01713A - Manufacturing method of fixed core assembly for oil-immersed solenoid - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a method of manufacturing a fixed core assembly for an oil-immersed solenoid.

(B) Prior Art When a laminated fixed core and a plunger guide are integrally fixed to a fixed core made of solid wood, the following methods have conventionally been used.

(1) As shown in Fig. 1, insert the laminated fixed core C about halfway into the tubular part of the solid steel fixed core a,
Fit the plunger guide d around the outer periphery of the laminated fixed core,
A method of joining the solid steel fixed core, laminated fixed core, and plunger guide integrally by welding the abutment e of the tubular part and the plunger guide d using electron beam welding or the like.

(2) As shown in Fig. 2, the tubular part and the plunger guide d are welded at the abutting part described in (1) on the outer periphery of the laminated fixed core C, and the laminated fixed core is fixed by welding the tubular part to the plunger guide d. This method is carried out by inserting a caulking pin g through the laminated fixed iron core C.

Both methods (1) and (2) have the advantage of reducing power consumption in terms of electrical characteristics because they can maximize the cross-sectional area of the laminated core. but,
In the product after the manufacturing process has been completed, there is a problem that the end face of the laminated core C on the plunger side is perpendicular to the axis X-X of the fixed core assembly, and the parallelism to the axis X-X of the plunger guide is not sufficient. There is a point. For this reason, when the plunger p is attracted, the plunger cannot move and stop smoothly, resulting in the generation of noise.

The cause of this noise generation is thought to be related to the manufacturing process of the laminated fixed core C. That is, a rectangular laminate 1 inserted through a laminate of silicon steel plates 1 as shown in FIG.
is cut into an annular shape as shown in FIG. 4 to form a laminated fixed iron core C. In this process, there are originally minute gaps between the laminated layers, and the heads of the caulking pins are cut to some extent, which weakens the clamping of the laminated layers.Furthermore, when the rectangular laminated body l is cut into an annular shape, the outer periphery peels off. Therefore, there are variations in the dimensions and external shape of the laminated fixed core C, and there are also variations in dimensions and angles when inserted into the tubular part of the solid steel fixed core A.
The perpendicularity of the plunger side end face to the axis XX and the parallelism of the plunger guide to the axis XX were insufficient, which caused noise when the plunger moved.

(c) Problems to be solved by the invention The problems to be solved by the invention are:
An object of the present invention is to manufacture an assembly of a laminated fixed core and a plunger guide so that these parts have perfect perpendicularity and parallelism with respect to the axis of the fixed core assembly, and do not generate noise when the plunger is attracted.

(d) Means for Solving the Problems The method for manufacturing a fixed core assembly according to the present invention involves inserting a laminated fixed core into a tubular portion of a fixed core made of solid wood, fixing it by welding, etc., and then The plunger side end face of the iron core is shaped, a plunger guide is fitted on the outer periphery of the tubular portion outside the laminated fixed iron core, and the abutting portion between the tubular portion and the plunger guide is welded.

(e) Embodiment An embodiment of the present invention will be described below with reference to the drawings.

Laminated fixed core 2 having an annular shape in Figs. 5 and 6
The entire fixed iron core 3 is inserted into the tubular portion 31 of the fixed iron core 3 made of peeled material.

The tubular portion 31 is formed with portions 32 (first tubular portion) and 33 (second tubular portion) whose outer diameter decreases stepwise toward the tip, and the laminated fixed core 2 and the second tubular portion 33 are thickened. The fixed laminated fixed core 2 and solid steel fixed core 3 are fixed in advance by welding 34 in a raised shape, and the end faces 21 etc. are processed to obtain a right angle, and then a plunger guide is attached to the outer periphery of the first tubular part 32. 4 is inserted or press-fitted and welded at the abutting part 5 between the tubular part 31 and the plunger guide 4 (it is better not to weld up to the laminated fixed core 2 to avoid gas generation), solid steel fixed core 3, laminated fixed core 2 and the plunger guide 4 are integrally connected to form a fixed core assembly 1.

The tubular portion 31, as shown in FIGS. 7 and 8,
Only the first tubular part 32a is formed and there is no second tubular part, and after inserting the laminated fixed core 2 into the tubular part 31 and fixing the first tubular part 32a and the laminated fixed core 2 by welding etc., the welded part 34 The plunger guide 4 may be inserted by scraping off the extra material.

(f) Effect As is clear from the above explanation, according to the present invention, the solid steel fixed core and the laminated fixed core can be fixed by welding or the like and the rear end surface etc. can be shaped. When a plunger guide is welded to a fixed core assembly, the perpendicularity and parallelism of the laminated fixed core and plunger guide to the axis can be obtained, and in a solenoid using this fixed core assembly, the plunger The effect is that no noise is generated when adsorbing.

[Brief explanation of the drawing]

Figures 1 and 2 are cross-sectional views of a fixed core assembly made by conventional methods, Figure 3 is a vertical cross-sectional view of a laminated fixed core in the manufacturing process, and Figure 4 is a cross-sectional view of a laminated fixed core. , FIG. 5 is a sectional view of a fixed core assembly manufactured according to the present invention, FIG. 6 is a partial sectional view of the same, and FIGS. 7 and 8 show other embodiments of the fixed core assembly according to the present invention. FIG. l: Fixed core assembly 2: Laminated fixed core 3: Steel fixed core 4: Plunger guide Figure 5 Figure 6 Figure 7 Figure 8

Claims (1)

[Claims] After inserting the laminated fixed core into the tubular part of the fixed core made of solid wood and fixing it by welding, etc., the plunger side end face of the fixed core is shaped, and the outer circumference of the tubular part on the outside of the laminated fixed core is shaped. A method of manufacturing a fixed iron core assembly for an oil-immersed solenoid, comprising fitting a plunger guide and welding abutting portions between the tubular portion and the plunger guide.