JPH0377304A - Banding of iron core laminate unit of stationary induction apparatus - Google Patents

Abstract

PURPOSE:To drastically shorten the iron-core assembly operation time without deteriorating the iron-core characteristic by a method wherein iron-core raw pieces are laminated stepwise, they are banded by welding one part and are cut off to easily handleable number of pieces each and each and these pieces are used as laminate units for an iron-core laminate operation. CONSTITUTION:Iron-core raw pieces 4 for leg use and iron-core raw pieces 5 for lower-part yoke use, which have been formed by cutting an electromagnetic steel plate, are laminated in prescribed positions by using guide holes 6 by means of a machine. Then, they are tightened and united; after which they are erected; a coil 7 which has been manufactured separately is inserted; after that, an iron-core laminate unit is inserted as an upper-part yoke to constitute a magnetic circuit where an iron core has been closed. The laminate unit is composed of five iron-core raw pieces 1. Consequently, the five pieces can be inserted simultaneously. As a result, the required time for this operation can be shortened sharply; on the other hand, leg iron cores and lower part iron cores are laminated by means of the machine. Thereby, the operation time can be drastically shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to an improvement of a stationary guide fence core having a step overlap joint, and particularly to a method for bundling core laminated units.

(Prior Art) Energy saving in power equipment is considered to be an important 11M, and continuous efforts are being made to reduce the energy consumption of power equipment.

Efforts have been made to reduce the iron loss that occurs in stationary inductors, and improvements have been made to the iron core structure.

Stair lap joints are also called step lap joints.
It is used in high-efficiency devices as a joining method for laminated cores with excellent magnetic properties such as iron loss characteristics.

For example, when constructing an iron core as shown in Fig. 8, this method involves cutting an electromagnetic steel plate to create core pieces 12 as shown in Fig. 9, and then cutting the core pieces 12 in the length direction as shown in Fig. 10. Stack them in a staggered manner. At this time, when viewed from the side, the end portions form a step-like shape as shown in FIG. If these are stacked as one laminated unit, the cross section of the joint at the corner will be laminated in a stepwise manner as shown in Figure 2.

(Problem to be solved by the invention) An iron core with such a joint structure has excellent magnetic properties, but the laminated units mentioned above cannot be handled at once, and must be handled in pieces, which increases the number of man-hours. Since it is not possible to shorten the length, a method for bundling multiple core pieces, which are the unit of lamination work, has been required.

The present invention has been made in order to improve the drawbacks of the prior art, and it is an object of the present invention to provide a simple means for bundling core laminated units.

[Structure of the invention]

(Means for Solving the Problems) The laminated unit bundling method of the present invention includes stacking a large number of core pieces at predetermined relative positions so that their ends are stepped, and stacking the core pieces on their sides. After binding them together by welding a part of them in a linear manner, they are divided into an appropriate number of sheets. That is, after laminating the core pieces 1 at predetermined positions as shown in FIG. In step 2, welding is carried out, and the core is first divided into wedges 3 into appropriate numbers as shown in FIG. 2 to create the core lamination unit shown in FIG. 3, which is used as a work unit for core stacking.

(Function) The present invention is constructed as described above, and since the binding by welding is local, it is easy to divide by separating this part, and since the binding force is weak and only on one side, the magnetic properties While it has almost no effect on the environment, it is strong enough to withstand manual handling and can be easily used for one task.

(Example) An example of the present invention will be described below with reference to the drawings.

As shown in FIG. 4, a leg core piece 4 cut from an electromagnetic steel plate and a lower yoke core piece 5 are laminated by machine at predetermined positions using guide holes 6. After tightening and assembling it, stand it up, insert the separately manufactured coil 7, and then insert the core laminated unit shown in Figure 3 as the upper yoke to create a magnetic circuit with the core closed as shown in Figure 5. It was configured as

In the upper yoke stacking work of this example, the stacking unit is 5
It consists of two iron core pieces 1, so it was possible to insert five pieces at the same time.

As a result, while the time required for this work was significantly reduced, the work time was also significantly reduced by laminating the other core parts, namely the leg core and the lower yoke core, by machine.

As another embodiment, as shown in FIG. 6, the leg core 8 and the yoke core 9 may be stacked in advance in a stepwise manner, and the insert core 10 may be finally inserted into a part of the corner to manufacture the core. good.

As shown in Fig. 7, the insert core is stacked in steps and has a linear welded part 11 on the outer part.In this example, the weight to be handled by hand is further reduced.
It can be done more easily.

Note that the welded portion can be ground off with a grinder or the like after the core is assembled, thereby further reducing the risk of short circuit between the layers of the core.

Furthermore, in one or more of the embodiments, the stepwise stacked connection of each core piece has been described, but it goes without saying that the same effect can be obtained by stepwise stacked connection of a plurality of core pieces.

〔Effect of the invention〕

As described above, in the present invention, core pieces are stacked in a stepwise manner, a part of which is bound by welding, and cut into pieces that are easy to handle, and this is used as a stacking unit for core stacking work. As a result, the core assembly work time can be significantly shortened without deteriorating the core characteristics.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the core lamination unit binding method of the present invention, Fig. 2 is an explanatory diagram of the core lamination unit division, Fig. 3 is an external view of the iron core lamination unit, and Fig. 4 is the assembly of the leg core and lower yoke core in the embodiment. Figure 5 is a longitudinal cross-sectional view of the same core, Figure 6 is a diagram showing a part of the core corner in another embodiment, Figure 7 is an external view of the insert core in Figure 6, and Figure 8 is an explanation of the core configuration. Figure 9 is a front view of the core element, Figure 10 is a front view of the core laminated unit, Figure 11 is an enlarged view of the end of the core laminated unit in Figure 10, and Figure 12 is a sectional view of the core joint. . 1.4.5.12... Core piece 2.11... Welded part 3... Wedge 6...
・Guide hole 7...Coil 8...Leg core 9...Yoke core 10...Insert core

Claims (1)

[Claims] A large number of core pieces are stacked at predetermined relative positions so that their ends are step-shaped, and the core pieces are welded in a line at a part of their side faces to bind them, and then the core pieces are assembled into a core. A method for bundling stationary inductor core laminated units, which is characterized by dividing into units of a suitable number for assembly work.