JPH0353855B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a method of manufacturing a ironless core armature.

(Background technology) The iron-core armature (hereinafter simply referred to as armature) of a cylindrical movable ring-type coreless motor has a structure in which a coil is hardened with resin such as epoxy.
3A and 4B and 4A and 4B show an example of the armature, and 3A and 4A are schematic perspective views of the armature, and 3B and 4B are schematic perspective views of the armature, respectively. B is a developed view showing a part of the end face of the coil wire in each figure A. In Figure 3 A and B,
The armature 1 consists of an inner layer coil 2 and an outer layer coil 3, and the coil terminal A of the inner layer coil 2 and the outer layer coil 3
and B, the coil wires are connected to each other according to the configuration of the armature. For example, at coil terminal A, coil wires #1 and #1', #2 and #2', etc. of inner layer coil 2 and outer layer coil 3 are connected to each other, and at coil terminal B, inner layer coil 2 and outer layer coil 3 are connected to each other. Coil wires #1 and #2', #2 and #3'...
are connected to each other to form an armature.

Similarly, in FIGS. 4A and 4B, the armature 1' is composed of the inner layer coil 2' and the outer layer coil 3', and at the coil end surface A', the inner layer coil 2' and the outer layer coil 3'
Coil wires #1 and #1', #2 and #2', etc. are connected to each other, and coil wires #6 and #7' of inner layer coil 2' and outer layer coil 3' are connected to each other at coil end surface B'. ,
#5 and #6' are connected to each other to form an armature.

Conventional armatures have had the following problems in connection of the end faces of the coil wires.

FIGS. 5A and 5B are diagrams for explaining a conventional method of connecting the end faces of coil wires of an armature. Figure 5 A is a diagram showing the terminals of the coil wires, and in order to connect the coil wires, the coil wire #1 to be connected is
Then, a V-notch 4 is connected to both wires using a V-punch (not shown) at the end of #1'. An auxiliary material 5 is press-fitted into this V-notch 4 and then welded using a laser 6. However, the following problems have occurred in the above manufacturing method.

FIG. 6 is a diagram illustrating problems in the conventional manufacturing method. When forming the V-notch 4 on the coil wire #1 with the V punch 7, the side edge 8 of the V-notch 4 is formed due to the plastic flow of the coil wire in the direction shown by arrow A in the figure.
bulges out, and this side edge 8 contacts the shoulder 9 of the V punch 7, and the V punch 7 does not reach the set depth H of the V notch, and each coil wire does not reach the depth of the V notch. This has the disadvantage of causing variations and lowering reliability. In addition, when a bulge occurs on the side edge 8, the side edge 8 is pressed by the shoulder 9 of the V punch 7, and there is no place for the force to escape, causing the already machined V notch 4' to deform as shown in the figure. This deformation not only makes press-fitting the auxiliary material difficult but also reduces its reliability.

(Object of the Invention) The present invention was proposed in view of the above-mentioned drawbacks, and includes stabilizing the depth of a V-notch for connecting end faces of coil wires in a method of manufacturing a coreless armature. The purpose is to prevent deformation of adjacent V-notches and improve the reliability of embedding auxiliary material.

(Disclosure of the Invention) In order to achieve the above object, the present invention provides a non-ferrous core armature in which an inner layer coil and an outer layer coil are arranged, and the end faces of the coil wires of the inner layer coil and the outer layer coil are joined. In the manufacturing method, plastic flow of the coil wires is absorbed by simultaneously forming V-notches between the coil wires to be connected using a V-punch with a recess in the shoulder, and an auxiliary material is press-fitted into the formed V-notch. The gist of this article is a method for manufacturing a iron-free core armature, which is characterized by the process of welding and joining.

An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1A and 1B and FIG. 2 are diagrams for explaining an embodiment of the present invention. The present invention relates to manufacturing the iron-free core armature illustrated in Fig. 3 or 4, in which Fig. 1 A and B are diagrams explaining the processing of a V-notch, and Fig. 2 is a diagram used for processing the V-notch. V to do
It is a figure showing a punch.

In FIGS. 1A and 1B, when connecting coil wires #1 and #1' to be connected to the inner layer coil 2 and outer layer coil 3, respectively, first punch the V notch 4 with the V punch 10. The auxiliary material 5 is press-fitted into the processed V-notch, and the coil wires #1 and #1' and the auxiliary material 5 are welded together using a laser.

FIG. 2 is a perspective view of the tip of the V-punch used in the connection process, and the shoulder of the V-punch 10 is provided with a recess 11. When processing the V notch 4 using this V punch 10, plastic flow of the coil wire occurs, but since the recess 11 is provided on the shoulder of the V punch 10, the plastic flow only acts in the direction of arrow B in the figure. However, the bulge on the side edge 8 of the V-notch 4 escapes into the recess 11 of the V-punch 10. This bulge on the side edge 8 escapes into the recess 11, causing the V punch 1
0 reaches the set depth H of the V-notch 4, and no force is applied to deform the adjacent existing V-notch 4'.

(Effects of the Invention) As described above, the present invention provides the following effects.

(a) The depth of the V-notch becomes stable.

(b) Deformation of adjacent V-notches becomes smaller.

(c) The reliability of the auxiliary material embedding process can be measured by (a) and (b) above.

[Brief explanation of drawings]

Fig. 1 A and B are diagrams explaining one embodiment of the present invention, Fig. 2 is a perspective view of a V-punch used in the present invention, Fig. 3 A and B and Fig. 4 A and B are iron-free cores. FIGS. 5A and 5B and FIG. 6, which show an example of an armature, are diagrams illustrating the connection of conventional coil wires. #1, #1'... Coil wire, 4, 4'... V notch, 10... V punch, 11... recess, 12... side edge of V notch.

Claims (1)

[Claims] 1. A method for manufacturing a iron-free core armature in which an inner layer coil and an outer layer coil are arranged and the end faces of the coil wires of the inner layer coil and the outer layer coil are joined, using a V-punch having a recessed part in the shoulder. The ironless core is characterized in that plastic flow of the coil wires is absorbed by simultaneously forming V-notches between the coil wires to be connected, and after press-fitting an auxiliary material into the formed V-notches, the welding is performed. Method of manufacturing armature.